3364 lines
99 KiB
C
3364 lines
99 KiB
C
/******************************************************************************
|
|
*
|
|
* Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
|
|
*
|
|
* The full GNU General Public License is included in this distribution in the
|
|
* file called LICENSE.
|
|
*
|
|
* Contact Information:
|
|
* Intel Linux Wireless <ilw@linux.intel.com>
|
|
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
|
|
*
|
|
*****************************************************************************/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <net/mac80211.h>
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/workqueue.h>
|
|
|
|
#include "iwl-dev.h"
|
|
#include "iwl-core.h"
|
|
#include "iwl-agn.h"
|
|
|
|
#define RS_NAME "iwl-agn-rs"
|
|
|
|
#define NUM_TRY_BEFORE_ANT_TOGGLE 1
|
|
#define IWL_NUMBER_TRY 1
|
|
#define IWL_HT_NUMBER_TRY 3
|
|
|
|
#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
|
|
#define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */
|
|
#define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */
|
|
|
|
/* max allowed rate miss before sync LQ cmd */
|
|
#define IWL_MISSED_RATE_MAX 15
|
|
/* max time to accum history 2 seconds */
|
|
#define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ)
|
|
|
|
static u8 rs_ht_to_legacy[] = {
|
|
IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX,
|
|
IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX,
|
|
IWL_RATE_6M_INDEX,
|
|
IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX,
|
|
IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX,
|
|
IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX,
|
|
IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX
|
|
};
|
|
|
|
static const u8 ant_toggle_lookup[] = {
|
|
/*ANT_NONE -> */ ANT_NONE,
|
|
/*ANT_A -> */ ANT_B,
|
|
/*ANT_B -> */ ANT_C,
|
|
/*ANT_AB -> */ ANT_BC,
|
|
/*ANT_C -> */ ANT_A,
|
|
/*ANT_AC -> */ ANT_AB,
|
|
/*ANT_BC -> */ ANT_AC,
|
|
/*ANT_ABC -> */ ANT_ABC,
|
|
};
|
|
|
|
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
|
|
[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
|
|
IWL_RATE_SISO_##s##M_PLCP, \
|
|
IWL_RATE_MIMO2_##s##M_PLCP,\
|
|
IWL_RATE_MIMO3_##s##M_PLCP,\
|
|
IWL_RATE_##r##M_IEEE, \
|
|
IWL_RATE_##ip##M_INDEX, \
|
|
IWL_RATE_##in##M_INDEX, \
|
|
IWL_RATE_##rp##M_INDEX, \
|
|
IWL_RATE_##rn##M_INDEX, \
|
|
IWL_RATE_##pp##M_INDEX, \
|
|
IWL_RATE_##np##M_INDEX }
|
|
|
|
/*
|
|
* Parameter order:
|
|
* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
|
|
*
|
|
* If there isn't a valid next or previous rate then INV is used which
|
|
* maps to IWL_RATE_INVALID
|
|
*
|
|
*/
|
|
const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
|
|
IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
|
|
IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
|
|
IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
|
|
IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
|
|
IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
|
|
IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
|
|
IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
|
|
IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
|
|
IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
|
|
IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
|
|
IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
|
|
IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
|
|
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
|
|
/* FIXME:RS: ^^ should be INV (legacy) */
|
|
};
|
|
|
|
static inline u8 rs_extract_rate(u32 rate_n_flags)
|
|
{
|
|
return (u8)(rate_n_flags & RATE_MCS_RATE_MSK);
|
|
}
|
|
|
|
static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
|
|
{
|
|
int idx = 0;
|
|
|
|
/* HT rate format */
|
|
if (rate_n_flags & RATE_MCS_HT_MSK) {
|
|
idx = rs_extract_rate(rate_n_flags);
|
|
|
|
if (idx >= IWL_RATE_MIMO3_6M_PLCP)
|
|
idx = idx - IWL_RATE_MIMO3_6M_PLCP;
|
|
else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
|
|
idx = idx - IWL_RATE_MIMO2_6M_PLCP;
|
|
|
|
idx += IWL_FIRST_OFDM_RATE;
|
|
/* skip 9M not supported in ht*/
|
|
if (idx >= IWL_RATE_9M_INDEX)
|
|
idx += 1;
|
|
if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
|
|
return idx;
|
|
|
|
/* legacy rate format, search for match in table */
|
|
} else {
|
|
for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
|
|
if (iwl_rates[idx].plcp ==
|
|
rs_extract_rate(rate_n_flags))
|
|
return idx;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void rs_rate_scale_perform(struct iwl_priv *priv,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta);
|
|
static void rs_fill_link_cmd(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta, u32 rate_n_flags);
|
|
static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
|
|
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
|
|
u32 *rate_n_flags, int index);
|
|
#else
|
|
static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
|
|
u32 *rate_n_flags, int index)
|
|
{}
|
|
#endif
|
|
|
|
/**
|
|
* The following tables contain the expected throughput metrics for all rates
|
|
*
|
|
* 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
|
|
*
|
|
* where invalid entries are zeros.
|
|
*
|
|
* CCK rates are only valid in legacy table and will only be used in G
|
|
* (2.4 GHz) band.
|
|
*/
|
|
|
|
static s32 expected_tpt_legacy[IWL_RATE_COUNT] = {
|
|
7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
|
|
};
|
|
|
|
static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */
|
|
{0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */
|
|
{0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */
|
|
{0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */
|
|
};
|
|
|
|
static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */
|
|
{0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */
|
|
{0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */
|
|
{0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */
|
|
};
|
|
|
|
static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */
|
|
{0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */
|
|
{0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */
|
|
{0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/
|
|
};
|
|
|
|
static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */
|
|
{0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */
|
|
{0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */
|
|
{0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */
|
|
};
|
|
|
|
static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */
|
|
{0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */
|
|
{0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */
|
|
{0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */
|
|
};
|
|
|
|
static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = {
|
|
{0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */
|
|
{0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */
|
|
{0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */
|
|
{0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */
|
|
};
|
|
|
|
/* mbps, mcs */
|
|
static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
|
|
{ "1", "BPSK DSSS"},
|
|
{ "2", "QPSK DSSS"},
|
|
{"5.5", "BPSK CCK"},
|
|
{ "11", "QPSK CCK"},
|
|
{ "6", "BPSK 1/2"},
|
|
{ "9", "BPSK 1/2"},
|
|
{ "12", "QPSK 1/2"},
|
|
{ "18", "QPSK 3/4"},
|
|
{ "24", "16QAM 1/2"},
|
|
{ "36", "16QAM 3/4"},
|
|
{ "48", "64QAM 2/3"},
|
|
{ "54", "64QAM 3/4"},
|
|
{ "60", "64QAM 5/6"},
|
|
};
|
|
|
|
#define MCS_INDEX_PER_STREAM (8)
|
|
|
|
static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
|
|
{
|
|
window->data = 0;
|
|
window->success_counter = 0;
|
|
window->success_ratio = IWL_INVALID_VALUE;
|
|
window->counter = 0;
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
window->stamp = 0;
|
|
}
|
|
|
|
static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
|
|
{
|
|
return (ant_type & valid_antenna) == ant_type;
|
|
}
|
|
|
|
/*
|
|
* removes the old data from the statistics. All data that is older than
|
|
* TID_MAX_TIME_DIFF, will be deleted.
|
|
*/
|
|
static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time)
|
|
{
|
|
/* The oldest age we want to keep */
|
|
u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
|
|
|
|
while (tl->queue_count &&
|
|
(tl->time_stamp < oldest_time)) {
|
|
tl->total -= tl->packet_count[tl->head];
|
|
tl->packet_count[tl->head] = 0;
|
|
tl->time_stamp += TID_QUEUE_CELL_SPACING;
|
|
tl->queue_count--;
|
|
tl->head++;
|
|
if (tl->head >= TID_QUEUE_MAX_SIZE)
|
|
tl->head = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* increment traffic load value for tid and also remove
|
|
* any old values if passed the certain time period
|
|
*/
|
|
static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data,
|
|
struct ieee80211_hdr *hdr)
|
|
{
|
|
u32 curr_time = jiffies_to_msecs(jiffies);
|
|
u32 time_diff;
|
|
s32 index;
|
|
struct iwl_traffic_load *tl = NULL;
|
|
u8 tid;
|
|
|
|
if (ieee80211_is_data_qos(hdr->frame_control)) {
|
|
u8 *qc = ieee80211_get_qos_ctl(hdr);
|
|
tid = qc[0] & 0xf;
|
|
} else
|
|
return IWL_MAX_TID_COUNT;
|
|
|
|
if (unlikely(tid >= IWL_MAX_TID_COUNT))
|
|
return IWL_MAX_TID_COUNT;
|
|
|
|
tl = &lq_data->load[tid];
|
|
|
|
curr_time -= curr_time % TID_ROUND_VALUE;
|
|
|
|
/* Happens only for the first packet. Initialize the data */
|
|
if (!(tl->queue_count)) {
|
|
tl->total = 1;
|
|
tl->time_stamp = curr_time;
|
|
tl->queue_count = 1;
|
|
tl->head = 0;
|
|
tl->packet_count[0] = 1;
|
|
return IWL_MAX_TID_COUNT;
|
|
}
|
|
|
|
time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
|
|
index = time_diff / TID_QUEUE_CELL_SPACING;
|
|
|
|
/* The history is too long: remove data that is older than */
|
|
/* TID_MAX_TIME_DIFF */
|
|
if (index >= TID_QUEUE_MAX_SIZE)
|
|
rs_tl_rm_old_stats(tl, curr_time);
|
|
|
|
index = (tl->head + index) % TID_QUEUE_MAX_SIZE;
|
|
tl->packet_count[index] = tl->packet_count[index] + 1;
|
|
tl->total = tl->total + 1;
|
|
|
|
if ((index + 1) > tl->queue_count)
|
|
tl->queue_count = index + 1;
|
|
|
|
return tid;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
/**
|
|
* Program the device to use fixed rate for frame transmit
|
|
* This is for debugging/testing only
|
|
* once the device start use fixed rate, we need to reload the module
|
|
* to being back the normal operation.
|
|
*/
|
|
static void rs_program_fix_rate(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct iwl_station_priv *sta_priv =
|
|
container_of(lq_sta, struct iwl_station_priv, lq_sta);
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
|
|
lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
|
|
lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
|
|
lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
|
|
/* testmode has higher priority to overwirte the fixed rate */
|
|
if (priv->tm_fixed_rate)
|
|
lq_sta->dbg_fixed_rate = priv->tm_fixed_rate;
|
|
#endif
|
|
|
|
IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n",
|
|
lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate);
|
|
|
|
if (lq_sta->dbg_fixed_rate) {
|
|
rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate);
|
|
iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC,
|
|
false);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
get the traffic load value for tid
|
|
*/
|
|
static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid)
|
|
{
|
|
u32 curr_time = jiffies_to_msecs(jiffies);
|
|
u32 time_diff;
|
|
s32 index;
|
|
struct iwl_traffic_load *tl = NULL;
|
|
|
|
if (tid >= IWL_MAX_TID_COUNT)
|
|
return 0;
|
|
|
|
tl = &(lq_data->load[tid]);
|
|
|
|
curr_time -= curr_time % TID_ROUND_VALUE;
|
|
|
|
if (!(tl->queue_count))
|
|
return 0;
|
|
|
|
time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
|
|
index = time_diff / TID_QUEUE_CELL_SPACING;
|
|
|
|
/* The history is too long: remove data that is older than */
|
|
/* TID_MAX_TIME_DIFF */
|
|
if (index >= TID_QUEUE_MAX_SIZE)
|
|
rs_tl_rm_old_stats(tl, curr_time);
|
|
|
|
return tl->total;
|
|
}
|
|
|
|
static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_data, u8 tid,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
int ret = -EAGAIN;
|
|
u32 load;
|
|
|
|
/*
|
|
* Don't create TX aggregation sessions when in high
|
|
* BT traffic, as they would just be disrupted by BT.
|
|
*/
|
|
if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) {
|
|
IWL_ERR(priv, "BT traffic (%d), no aggregation allowed\n",
|
|
priv->bt_traffic_load);
|
|
return ret;
|
|
}
|
|
|
|
load = rs_tl_get_load(lq_data, tid);
|
|
|
|
if ((iwlagn_mod_params.auto_agg) || (load > IWL_AGG_LOAD_THRESHOLD)) {
|
|
IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n",
|
|
sta->addr, tid);
|
|
ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
|
|
if (ret == -EAGAIN) {
|
|
/*
|
|
* driver and mac80211 is out of sync
|
|
* this might be cause by reloading firmware
|
|
* stop the tx ba session here
|
|
*/
|
|
IWL_ERR(priv, "Fail start Tx agg on tid: %d\n",
|
|
tid);
|
|
ieee80211_stop_tx_ba_session(sta, tid);
|
|
}
|
|
} else {
|
|
IWL_DEBUG_HT(priv, "Aggregation not enabled for tid %d "
|
|
"because load = %u\n", tid, load);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid,
|
|
struct iwl_lq_sta *lq_data,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
if (tid < IWL_MAX_TID_COUNT)
|
|
rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta);
|
|
else
|
|
IWL_ERR(priv, "tid exceeds max TID count: %d/%d\n",
|
|
tid, IWL_MAX_TID_COUNT);
|
|
}
|
|
|
|
static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
|
|
{
|
|
return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
|
|
!!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
|
|
!!(rate_n_flags & RATE_MCS_ANT_C_MSK);
|
|
}
|
|
|
|
/*
|
|
* Static function to get the expected throughput from an iwl_scale_tbl_info
|
|
* that wraps a NULL pointer check
|
|
*/
|
|
static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
|
|
{
|
|
if (tbl->expected_tpt)
|
|
return tbl->expected_tpt[rs_index];
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rs_collect_tx_data - Update the success/failure sliding window
|
|
*
|
|
* We keep a sliding window of the last 62 packets transmitted
|
|
* at this rate. window->data contains the bitmask of successful
|
|
* packets.
|
|
*/
|
|
static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
|
|
int scale_index, int attempts, int successes)
|
|
{
|
|
struct iwl_rate_scale_data *window = NULL;
|
|
static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
|
|
s32 fail_count, tpt;
|
|
|
|
if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
|
|
return -EINVAL;
|
|
|
|
/* Select window for current tx bit rate */
|
|
window = &(tbl->win[scale_index]);
|
|
|
|
/* Get expected throughput */
|
|
tpt = get_expected_tpt(tbl, scale_index);
|
|
|
|
/*
|
|
* Keep track of only the latest 62 tx frame attempts in this rate's
|
|
* history window; anything older isn't really relevant any more.
|
|
* If we have filled up the sliding window, drop the oldest attempt;
|
|
* if the oldest attempt (highest bit in bitmap) shows "success",
|
|
* subtract "1" from the success counter (this is the main reason
|
|
* we keep these bitmaps!).
|
|
*/
|
|
while (attempts > 0) {
|
|
if (window->counter >= IWL_RATE_MAX_WINDOW) {
|
|
|
|
/* remove earliest */
|
|
window->counter = IWL_RATE_MAX_WINDOW - 1;
|
|
|
|
if (window->data & mask) {
|
|
window->data &= ~mask;
|
|
window->success_counter--;
|
|
}
|
|
}
|
|
|
|
/* Increment frames-attempted counter */
|
|
window->counter++;
|
|
|
|
/* Shift bitmap by one frame to throw away oldest history */
|
|
window->data <<= 1;
|
|
|
|
/* Mark the most recent #successes attempts as successful */
|
|
if (successes > 0) {
|
|
window->success_counter++;
|
|
window->data |= 0x1;
|
|
successes--;
|
|
}
|
|
|
|
attempts--;
|
|
}
|
|
|
|
/* Calculate current success ratio, avoid divide-by-0! */
|
|
if (window->counter > 0)
|
|
window->success_ratio = 128 * (100 * window->success_counter)
|
|
/ window->counter;
|
|
else
|
|
window->success_ratio = IWL_INVALID_VALUE;
|
|
|
|
fail_count = window->counter - window->success_counter;
|
|
|
|
/* Calculate average throughput, if we have enough history. */
|
|
if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) ||
|
|
(window->success_counter >= IWL_RATE_MIN_SUCCESS_TH))
|
|
window->average_tpt = (window->success_ratio * tpt + 64) / 128;
|
|
else
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
|
|
/* Tag this window as having been updated */
|
|
window->stamp = jiffies;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Fill uCode API rate_n_flags field, based on "search" or "active" table.
|
|
*/
|
|
/* FIXME:RS:remove this function and put the flags statically in the table */
|
|
static u32 rate_n_flags_from_tbl(struct iwl_priv *priv,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int index, u8 use_green)
|
|
{
|
|
u32 rate_n_flags = 0;
|
|
|
|
if (is_legacy(tbl->lq_type)) {
|
|
rate_n_flags = iwl_rates[index].plcp;
|
|
if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
|
|
rate_n_flags |= RATE_MCS_CCK_MSK;
|
|
|
|
} else if (is_Ht(tbl->lq_type)) {
|
|
if (index > IWL_LAST_OFDM_RATE) {
|
|
IWL_ERR(priv, "Invalid HT rate index %d\n", index);
|
|
index = IWL_LAST_OFDM_RATE;
|
|
}
|
|
rate_n_flags = RATE_MCS_HT_MSK;
|
|
|
|
if (is_siso(tbl->lq_type))
|
|
rate_n_flags |= iwl_rates[index].plcp_siso;
|
|
else if (is_mimo2(tbl->lq_type))
|
|
rate_n_flags |= iwl_rates[index].plcp_mimo2;
|
|
else
|
|
rate_n_flags |= iwl_rates[index].plcp_mimo3;
|
|
} else {
|
|
IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type);
|
|
}
|
|
|
|
rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) &
|
|
RATE_MCS_ANT_ABC_MSK);
|
|
|
|
if (is_Ht(tbl->lq_type)) {
|
|
if (tbl->is_ht40) {
|
|
if (tbl->is_dup)
|
|
rate_n_flags |= RATE_MCS_DUP_MSK;
|
|
else
|
|
rate_n_flags |= RATE_MCS_HT40_MSK;
|
|
}
|
|
if (tbl->is_SGI)
|
|
rate_n_flags |= RATE_MCS_SGI_MSK;
|
|
|
|
if (use_green) {
|
|
rate_n_flags |= RATE_MCS_GF_MSK;
|
|
if (is_siso(tbl->lq_type) && tbl->is_SGI) {
|
|
rate_n_flags &= ~RATE_MCS_SGI_MSK;
|
|
IWL_ERR(priv, "GF was set with SGI:SISO\n");
|
|
}
|
|
}
|
|
}
|
|
return rate_n_flags;
|
|
}
|
|
|
|
/*
|
|
* Interpret uCode API's rate_n_flags format,
|
|
* fill "search" or "active" tx mode table.
|
|
*/
|
|
static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
|
|
enum ieee80211_band band,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int *rate_idx)
|
|
{
|
|
u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK);
|
|
u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags);
|
|
u8 mcs;
|
|
|
|
memset(tbl, 0, sizeof(struct iwl_scale_tbl_info));
|
|
*rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
|
|
|
|
if (*rate_idx == IWL_RATE_INVALID) {
|
|
*rate_idx = -1;
|
|
return -EINVAL;
|
|
}
|
|
tbl->is_SGI = 0; /* default legacy setup */
|
|
tbl->is_ht40 = 0;
|
|
tbl->is_dup = 0;
|
|
tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
|
|
tbl->lq_type = LQ_NONE;
|
|
tbl->max_search = IWL_MAX_SEARCH;
|
|
|
|
/* legacy rate format */
|
|
if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
|
|
if (num_of_ant == 1) {
|
|
if (band == IEEE80211_BAND_5GHZ)
|
|
tbl->lq_type = LQ_A;
|
|
else
|
|
tbl->lq_type = LQ_G;
|
|
}
|
|
/* HT rate format */
|
|
} else {
|
|
if (rate_n_flags & RATE_MCS_SGI_MSK)
|
|
tbl->is_SGI = 1;
|
|
|
|
if ((rate_n_flags & RATE_MCS_HT40_MSK) ||
|
|
(rate_n_flags & RATE_MCS_DUP_MSK))
|
|
tbl->is_ht40 = 1;
|
|
|
|
if (rate_n_flags & RATE_MCS_DUP_MSK)
|
|
tbl->is_dup = 1;
|
|
|
|
mcs = rs_extract_rate(rate_n_flags);
|
|
|
|
/* SISO */
|
|
if (mcs <= IWL_RATE_SISO_60M_PLCP) {
|
|
if (num_of_ant == 1)
|
|
tbl->lq_type = LQ_SISO; /*else NONE*/
|
|
/* MIMO2 */
|
|
} else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) {
|
|
if (num_of_ant == 2)
|
|
tbl->lq_type = LQ_MIMO2;
|
|
/* MIMO3 */
|
|
} else {
|
|
if (num_of_ant == 3) {
|
|
tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
|
|
tbl->lq_type = LQ_MIMO3;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* switch to another antenna/antennas and return 1 */
|
|
/* if no other valid antenna found, return 0 */
|
|
static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
u8 new_ant_type;
|
|
|
|
if (!tbl->ant_type || tbl->ant_type > ANT_ABC)
|
|
return 0;
|
|
|
|
if (!rs_is_valid_ant(valid_ant, tbl->ant_type))
|
|
return 0;
|
|
|
|
new_ant_type = ant_toggle_lookup[tbl->ant_type];
|
|
|
|
while ((new_ant_type != tbl->ant_type) &&
|
|
!rs_is_valid_ant(valid_ant, new_ant_type))
|
|
new_ant_type = ant_toggle_lookup[new_ant_type];
|
|
|
|
if (new_ant_type == tbl->ant_type)
|
|
return 0;
|
|
|
|
tbl->ant_type = new_ant_type;
|
|
*rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK;
|
|
*rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Green-field mode is valid if the station supports it and
|
|
* there are no non-GF stations present in the BSS.
|
|
*/
|
|
static bool rs_use_green(struct ieee80211_sta *sta)
|
|
{
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
|
|
!(ctx->ht.non_gf_sta_present);
|
|
}
|
|
|
|
/**
|
|
* rs_get_supported_rates - get the available rates
|
|
*
|
|
* if management frame or broadcast frame only return
|
|
* basic available rates.
|
|
*
|
|
*/
|
|
static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_hdr *hdr,
|
|
enum iwl_table_type rate_type)
|
|
{
|
|
if (is_legacy(rate_type)) {
|
|
return lq_sta->active_legacy_rate;
|
|
} else {
|
|
if (is_siso(rate_type))
|
|
return lq_sta->active_siso_rate;
|
|
else if (is_mimo2(rate_type))
|
|
return lq_sta->active_mimo2_rate;
|
|
else
|
|
return lq_sta->active_mimo3_rate;
|
|
}
|
|
}
|
|
|
|
static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask,
|
|
int rate_type)
|
|
{
|
|
u8 high = IWL_RATE_INVALID;
|
|
u8 low = IWL_RATE_INVALID;
|
|
|
|
/* 802.11A or ht walks to the next literal adjacent rate in
|
|
* the rate table */
|
|
if (is_a_band(rate_type) || !is_legacy(rate_type)) {
|
|
int i;
|
|
u32 mask;
|
|
|
|
/* Find the previous rate that is in the rate mask */
|
|
i = index - 1;
|
|
for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
|
|
if (rate_mask & mask) {
|
|
low = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Find the next rate that is in the rate mask */
|
|
i = index + 1;
|
|
for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
|
|
if (rate_mask & mask) {
|
|
high = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (high << 8) | low;
|
|
}
|
|
|
|
low = index;
|
|
while (low != IWL_RATE_INVALID) {
|
|
low = iwl_rates[low].prev_rs;
|
|
if (low == IWL_RATE_INVALID)
|
|
break;
|
|
if (rate_mask & (1 << low))
|
|
break;
|
|
IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low);
|
|
}
|
|
|
|
high = index;
|
|
while (high != IWL_RATE_INVALID) {
|
|
high = iwl_rates[high].next_rs;
|
|
if (high == IWL_RATE_INVALID)
|
|
break;
|
|
if (rate_mask & (1 << high))
|
|
break;
|
|
IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high);
|
|
}
|
|
|
|
return (high << 8) | low;
|
|
}
|
|
|
|
static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
u8 scale_index, u8 ht_possible)
|
|
{
|
|
s32 low;
|
|
u16 rate_mask;
|
|
u16 high_low;
|
|
u8 switch_to_legacy = 0;
|
|
u8 is_green = lq_sta->is_green;
|
|
struct iwl_priv *priv = lq_sta->drv;
|
|
|
|
/* check if we need to switch from HT to legacy rates.
|
|
* assumption is that mandatory rates (1Mbps or 6Mbps)
|
|
* are always supported (spec demand) */
|
|
if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) {
|
|
switch_to_legacy = 1;
|
|
scale_index = rs_ht_to_legacy[scale_index];
|
|
if (lq_sta->band == IEEE80211_BAND_5GHZ)
|
|
tbl->lq_type = LQ_A;
|
|
else
|
|
tbl->lq_type = LQ_G;
|
|
|
|
if (num_of_ant(tbl->ant_type) > 1)
|
|
tbl->ant_type =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
|
|
tbl->is_ht40 = 0;
|
|
tbl->is_SGI = 0;
|
|
tbl->max_search = IWL_MAX_SEARCH;
|
|
}
|
|
|
|
rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
|
|
|
|
/* Mask with station rate restriction */
|
|
if (is_legacy(tbl->lq_type)) {
|
|
/* supp_rates has no CCK bits in A mode */
|
|
if (lq_sta->band == IEEE80211_BAND_5GHZ)
|
|
rate_mask = (u16)(rate_mask &
|
|
(lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
|
|
else
|
|
rate_mask = (u16)(rate_mask & lq_sta->supp_rates);
|
|
}
|
|
|
|
/* If we switched from HT to legacy, check current rate */
|
|
if (switch_to_legacy && (rate_mask & (1 << scale_index))) {
|
|
low = scale_index;
|
|
goto out;
|
|
}
|
|
|
|
high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask,
|
|
tbl->lq_type);
|
|
low = high_low & 0xff;
|
|
|
|
if (low == IWL_RATE_INVALID)
|
|
low = scale_index;
|
|
|
|
out:
|
|
return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
|
|
}
|
|
|
|
/*
|
|
* Simple function to compare two rate scale table types
|
|
*/
|
|
static bool table_type_matches(struct iwl_scale_tbl_info *a,
|
|
struct iwl_scale_tbl_info *b)
|
|
{
|
|
return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) &&
|
|
(a->is_SGI == b->is_SGI);
|
|
}
|
|
|
|
static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl;
|
|
bool full_concurrent = priv->bt_full_concurrent;
|
|
unsigned long flags;
|
|
|
|
if (priv->bt_ant_couple_ok) {
|
|
/*
|
|
* Is there a need to switch between
|
|
* full concurrency and 3-wire?
|
|
*/
|
|
spin_lock_irqsave(&priv->shrd->lock, flags);
|
|
if (priv->bt_ci_compliance && priv->bt_ant_couple_ok)
|
|
full_concurrent = true;
|
|
else
|
|
full_concurrent = false;
|
|
spin_unlock_irqrestore(&priv->shrd->lock, flags);
|
|
}
|
|
if ((priv->bt_traffic_load != priv->last_bt_traffic_load) ||
|
|
(priv->bt_full_concurrent != full_concurrent)) {
|
|
priv->bt_full_concurrent = full_concurrent;
|
|
|
|
/* Update uCode's rate table. */
|
|
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
|
|
iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
|
|
|
|
queue_work(priv->workqueue, &priv->bt_full_concurrency);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* mac80211 sends us Tx status
|
|
*/
|
|
static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
struct sk_buff *skb)
|
|
{
|
|
int legacy_success;
|
|
int retries;
|
|
int rs_index, mac_index, i;
|
|
struct iwl_lq_sta *lq_sta = priv_sta;
|
|
struct iwl_link_quality_cmd *table;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
struct iwl_priv *priv = (struct iwl_priv *)priv_r;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
enum mac80211_rate_control_flags mac_flags;
|
|
u32 tx_rate;
|
|
struct iwl_scale_tbl_info tbl_type;
|
|
struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
|
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */
|
|
if (!lq_sta) {
|
|
IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n");
|
|
return;
|
|
} else if (!lq_sta->drv) {
|
|
IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
|
|
return;
|
|
}
|
|
|
|
if (!ieee80211_is_data(hdr->frame_control) ||
|
|
info->flags & IEEE80211_TX_CTL_NO_ACK)
|
|
return;
|
|
|
|
/* This packet was aggregated but doesn't carry status info */
|
|
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
|
|
!(info->flags & IEEE80211_TX_STAT_AMPDU))
|
|
return;
|
|
|
|
/*
|
|
* Ignore this Tx frame response if its initial rate doesn't match
|
|
* that of latest Link Quality command. There may be stragglers
|
|
* from a previous Link Quality command, but we're no longer interested
|
|
* in those; they're either from the "active" mode while we're trying
|
|
* to check "search" mode, or a prior "search" mode after we've moved
|
|
* to a new "search" mode (which might become the new "active" mode).
|
|
*/
|
|
table = &lq_sta->lq;
|
|
tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
|
|
rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index);
|
|
if (priv->band == IEEE80211_BAND_5GHZ)
|
|
rs_index -= IWL_FIRST_OFDM_RATE;
|
|
mac_flags = info->status.rates[0].flags;
|
|
mac_index = info->status.rates[0].idx;
|
|
/* For HT packets, map MCS to PLCP */
|
|
if (mac_flags & IEEE80211_TX_RC_MCS) {
|
|
mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */
|
|
if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE))
|
|
mac_index++;
|
|
/*
|
|
* mac80211 HT index is always zero-indexed; we need to move
|
|
* HT OFDM rates after CCK rates in 2.4 GHz band
|
|
*/
|
|
if (priv->band == IEEE80211_BAND_2GHZ)
|
|
mac_index += IWL_FIRST_OFDM_RATE;
|
|
}
|
|
/* Here we actually compare this rate to the latest LQ command */
|
|
if ((mac_index < 0) ||
|
|
(tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) ||
|
|
(tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) ||
|
|
(tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) ||
|
|
(tbl_type.ant_type != info->antenna_sel_tx) ||
|
|
(!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) ||
|
|
(!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) ||
|
|
(rs_index != mac_index)) {
|
|
IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate);
|
|
/*
|
|
* Since rates mis-match, the last LQ command may have failed.
|
|
* After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
|
|
* ... driver.
|
|
*/
|
|
lq_sta->missed_rate_counter++;
|
|
if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) {
|
|
lq_sta->missed_rate_counter = 0;
|
|
iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
|
|
}
|
|
/* Regardless, ignore this status info for outdated rate */
|
|
return;
|
|
} else
|
|
/* Rate did match, so reset the missed_rate_counter */
|
|
lq_sta->missed_rate_counter = 0;
|
|
|
|
/* Figure out if rate scale algorithm is in active or search table */
|
|
if (table_type_matches(&tbl_type,
|
|
&(lq_sta->lq_info[lq_sta->active_tbl]))) {
|
|
curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
} else if (table_type_matches(&tbl_type,
|
|
&lq_sta->lq_info[1 - lq_sta->active_tbl])) {
|
|
curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
} else {
|
|
IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n");
|
|
tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
IWL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n",
|
|
tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
|
|
tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
|
|
IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n",
|
|
tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI);
|
|
IWL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n",
|
|
tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI);
|
|
/*
|
|
* no matching table found, let's by-pass the data collection
|
|
* and continue to perform rate scale to find the rate table
|
|
*/
|
|
rs_stay_in_table(lq_sta, true);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Updating the frame history depends on whether packets were
|
|
* aggregated.
|
|
*
|
|
* For aggregation, all packets were transmitted at the same rate, the
|
|
* first index into rate scale table.
|
|
*/
|
|
if (info->flags & IEEE80211_TX_STAT_AMPDU) {
|
|
tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
|
|
rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
|
|
&rs_index);
|
|
rs_collect_tx_data(curr_tbl, rs_index,
|
|
info->status.ampdu_len,
|
|
info->status.ampdu_ack_len);
|
|
|
|
/* Update success/fail counts if not searching for new mode */
|
|
if (lq_sta->stay_in_tbl) {
|
|
lq_sta->total_success += info->status.ampdu_ack_len;
|
|
lq_sta->total_failed += (info->status.ampdu_len -
|
|
info->status.ampdu_ack_len);
|
|
}
|
|
} else {
|
|
/*
|
|
* For legacy, update frame history with for each Tx retry.
|
|
*/
|
|
retries = info->status.rates[0].count - 1;
|
|
/* HW doesn't send more than 15 retries */
|
|
retries = min(retries, 15);
|
|
|
|
/* The last transmission may have been successful */
|
|
legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
|
|
/* Collect data for each rate used during failed TX attempts */
|
|
for (i = 0; i <= retries; ++i) {
|
|
tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags);
|
|
rs_get_tbl_info_from_mcs(tx_rate, priv->band,
|
|
&tbl_type, &rs_index);
|
|
/*
|
|
* Only collect stats if retried rate is in the same RS
|
|
* table as active/search.
|
|
*/
|
|
if (table_type_matches(&tbl_type, curr_tbl))
|
|
tmp_tbl = curr_tbl;
|
|
else if (table_type_matches(&tbl_type, other_tbl))
|
|
tmp_tbl = other_tbl;
|
|
else
|
|
continue;
|
|
rs_collect_tx_data(tmp_tbl, rs_index, 1,
|
|
i < retries ? 0 : legacy_success);
|
|
}
|
|
|
|
/* Update success/fail counts if not searching for new mode */
|
|
if (lq_sta->stay_in_tbl) {
|
|
lq_sta->total_success += legacy_success;
|
|
lq_sta->total_failed += retries + (1 - legacy_success);
|
|
}
|
|
}
|
|
/* The last TX rate is cached in lq_sta; it's set in if/else above */
|
|
lq_sta->last_rate_n_flags = tx_rate;
|
|
done:
|
|
/* See if there's a better rate or modulation mode to try. */
|
|
if (sta && sta->supp_rates[sband->band])
|
|
rs_rate_scale_perform(priv, skb, sta, lq_sta);
|
|
|
|
#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_IWLWIFI_DEVICE_TESTMODE)
|
|
if ((priv->tm_fixed_rate) &&
|
|
(priv->tm_fixed_rate != lq_sta->dbg_fixed_rate))
|
|
rs_program_fix_rate(priv, lq_sta);
|
|
#endif
|
|
if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist)
|
|
rs_bt_update_lq(priv, ctx, lq_sta);
|
|
}
|
|
|
|
/*
|
|
* Begin a period of staying with a selected modulation mode.
|
|
* Set "stay_in_tbl" flag to prevent any mode switches.
|
|
* Set frame tx success limits according to legacy vs. high-throughput,
|
|
* and reset overall (spanning all rates) tx success history statistics.
|
|
* These control how long we stay using same modulation mode before
|
|
* searching for a new mode.
|
|
*/
|
|
static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
IWL_DEBUG_RATE(priv, "we are staying in the same table\n");
|
|
lq_sta->stay_in_tbl = 1; /* only place this gets set */
|
|
if (is_legacy) {
|
|
lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT;
|
|
lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT;
|
|
lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT;
|
|
} else {
|
|
lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT;
|
|
lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT;
|
|
lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT;
|
|
}
|
|
lq_sta->table_count = 0;
|
|
lq_sta->total_failed = 0;
|
|
lq_sta->total_success = 0;
|
|
lq_sta->flush_timer = jiffies;
|
|
lq_sta->action_counter = 0;
|
|
}
|
|
|
|
/*
|
|
* Find correct throughput table for given mode of modulation
|
|
*/
|
|
static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl)
|
|
{
|
|
/* Used to choose among HT tables */
|
|
s32 (*ht_tbl_pointer)[IWL_RATE_COUNT];
|
|
|
|
/* Check for invalid LQ type */
|
|
if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) {
|
|
tbl->expected_tpt = expected_tpt_legacy;
|
|
return;
|
|
}
|
|
|
|
/* Legacy rates have only one table */
|
|
if (is_legacy(tbl->lq_type)) {
|
|
tbl->expected_tpt = expected_tpt_legacy;
|
|
return;
|
|
}
|
|
|
|
/* Choose among many HT tables depending on number of streams
|
|
* (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation
|
|
* status */
|
|
if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
|
|
ht_tbl_pointer = expected_tpt_siso20MHz;
|
|
else if (is_siso(tbl->lq_type))
|
|
ht_tbl_pointer = expected_tpt_siso40MHz;
|
|
else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
|
|
ht_tbl_pointer = expected_tpt_mimo2_20MHz;
|
|
else if (is_mimo2(tbl->lq_type))
|
|
ht_tbl_pointer = expected_tpt_mimo2_40MHz;
|
|
else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
|
|
ht_tbl_pointer = expected_tpt_mimo3_20MHz;
|
|
else /* if (is_mimo3(tbl->lq_type)) <-- must be true */
|
|
ht_tbl_pointer = expected_tpt_mimo3_40MHz;
|
|
|
|
if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */
|
|
tbl->expected_tpt = ht_tbl_pointer[0];
|
|
else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */
|
|
tbl->expected_tpt = ht_tbl_pointer[1];
|
|
else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */
|
|
tbl->expected_tpt = ht_tbl_pointer[2];
|
|
else /* AGG+SGI */
|
|
tbl->expected_tpt = ht_tbl_pointer[3];
|
|
}
|
|
|
|
/*
|
|
* Find starting rate for new "search" high-throughput mode of modulation.
|
|
* Goal is to find lowest expected rate (under perfect conditions) that is
|
|
* above the current measured throughput of "active" mode, to give new mode
|
|
* a fair chance to prove itself without too many challenges.
|
|
*
|
|
* This gets called when transitioning to more aggressive modulation
|
|
* (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive
|
|
* (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need
|
|
* to decrease to match "active" throughput. When moving from MIMO to SISO,
|
|
* bit rate will typically need to increase, but not if performance was bad.
|
|
*/
|
|
static s32 rs_get_best_rate(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl, /* "search" */
|
|
u16 rate_mask, s8 index)
|
|
{
|
|
/* "active" values */
|
|
struct iwl_scale_tbl_info *active_tbl =
|
|
&(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
s32 active_sr = active_tbl->win[index].success_ratio;
|
|
s32 active_tpt = active_tbl->expected_tpt[index];
|
|
|
|
/* expected "search" throughput */
|
|
s32 *tpt_tbl = tbl->expected_tpt;
|
|
|
|
s32 new_rate, high, low, start_hi;
|
|
u16 high_low;
|
|
s8 rate = index;
|
|
|
|
new_rate = high = low = start_hi = IWL_RATE_INVALID;
|
|
|
|
for (; ;) {
|
|
high_low = rs_get_adjacent_rate(priv, rate, rate_mask,
|
|
tbl->lq_type);
|
|
|
|
low = high_low & 0xff;
|
|
high = (high_low >> 8) & 0xff;
|
|
|
|
/*
|
|
* Lower the "search" bit rate, to give new "search" mode
|
|
* approximately the same throughput as "active" if:
|
|
*
|
|
* 1) "Active" mode has been working modestly well (but not
|
|
* great), and expected "search" throughput (under perfect
|
|
* conditions) at candidate rate is above the actual
|
|
* measured "active" throughput (but less than expected
|
|
* "active" throughput under perfect conditions).
|
|
* OR
|
|
* 2) "Active" mode has been working perfectly or very well
|
|
* and expected "search" throughput (under perfect
|
|
* conditions) at candidate rate is above expected
|
|
* "active" throughput (under perfect conditions).
|
|
*/
|
|
if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) &&
|
|
((active_sr > IWL_RATE_DECREASE_TH) &&
|
|
(active_sr <= IWL_RATE_HIGH_TH) &&
|
|
(tpt_tbl[rate] <= active_tpt))) ||
|
|
((active_sr >= IWL_RATE_SCALE_SWITCH) &&
|
|
(tpt_tbl[rate] > active_tpt))) {
|
|
|
|
/* (2nd or later pass)
|
|
* If we've already tried to raise the rate, and are
|
|
* now trying to lower it, use the higher rate. */
|
|
if (start_hi != IWL_RATE_INVALID) {
|
|
new_rate = start_hi;
|
|
break;
|
|
}
|
|
|
|
new_rate = rate;
|
|
|
|
/* Loop again with lower rate */
|
|
if (low != IWL_RATE_INVALID)
|
|
rate = low;
|
|
|
|
/* Lower rate not available, use the original */
|
|
else
|
|
break;
|
|
|
|
/* Else try to raise the "search" rate to match "active" */
|
|
} else {
|
|
/* (2nd or later pass)
|
|
* If we've already tried to lower the rate, and are
|
|
* now trying to raise it, use the lower rate. */
|
|
if (new_rate != IWL_RATE_INVALID)
|
|
break;
|
|
|
|
/* Loop again with higher rate */
|
|
else if (high != IWL_RATE_INVALID) {
|
|
start_hi = high;
|
|
rate = high;
|
|
|
|
/* Higher rate not available, use the original */
|
|
} else {
|
|
new_rate = rate;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return new_rate;
|
|
}
|
|
|
|
/*
|
|
* Set up search table for MIMO2
|
|
*/
|
|
static int rs_switch_to_mimo2(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_scale_tbl_info *tbl, int index)
|
|
{
|
|
u16 rate_mask;
|
|
s32 rate;
|
|
s8 is_green = lq_sta->is_green;
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
|
|
return -1;
|
|
|
|
if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
|
|
== WLAN_HT_CAP_SM_PS_STATIC)
|
|
return -1;
|
|
|
|
/* Need both Tx chains/antennas to support MIMO */
|
|
if (hw_params(priv).tx_chains_num < 2)
|
|
return -1;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n");
|
|
|
|
tbl->lq_type = LQ_MIMO2;
|
|
tbl->is_dup = lq_sta->is_dup;
|
|
tbl->action = 0;
|
|
tbl->max_search = IWL_MAX_SEARCH;
|
|
rate_mask = lq_sta->active_mimo2_rate;
|
|
|
|
if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
|
|
tbl->is_ht40 = 1;
|
|
else
|
|
tbl->is_ht40 = 0;
|
|
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
|
|
rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
|
|
if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
|
|
IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
|
|
rate, rate_mask);
|
|
return -1;
|
|
}
|
|
tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
|
|
tbl->current_rate, is_green);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set up search table for MIMO3
|
|
*/
|
|
static int rs_switch_to_mimo3(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_scale_tbl_info *tbl, int index)
|
|
{
|
|
u16 rate_mask;
|
|
s32 rate;
|
|
s8 is_green = lq_sta->is_green;
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
|
|
return -1;
|
|
|
|
if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
|
|
== WLAN_HT_CAP_SM_PS_STATIC)
|
|
return -1;
|
|
|
|
/* Need both Tx chains/antennas to support MIMO */
|
|
if (hw_params(priv).tx_chains_num < 3)
|
|
return -1;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n");
|
|
|
|
tbl->lq_type = LQ_MIMO3;
|
|
tbl->is_dup = lq_sta->is_dup;
|
|
tbl->action = 0;
|
|
tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
|
|
rate_mask = lq_sta->active_mimo3_rate;
|
|
|
|
if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
|
|
tbl->is_ht40 = 1;
|
|
else
|
|
tbl->is_ht40 = 0;
|
|
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
|
|
rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n",
|
|
rate, rate_mask);
|
|
if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
|
|
IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
|
|
rate, rate_mask);
|
|
return -1;
|
|
}
|
|
tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
|
|
tbl->current_rate, is_green);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set up search table for SISO
|
|
*/
|
|
static int rs_switch_to_siso(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_scale_tbl_info *tbl, int index)
|
|
{
|
|
u16 rate_mask;
|
|
u8 is_green = lq_sta->is_green;
|
|
s32 rate;
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
|
|
return -1;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n");
|
|
|
|
tbl->is_dup = lq_sta->is_dup;
|
|
tbl->lq_type = LQ_SISO;
|
|
tbl->action = 0;
|
|
tbl->max_search = IWL_MAX_SEARCH;
|
|
rate_mask = lq_sta->active_siso_rate;
|
|
|
|
if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
|
|
tbl->is_ht40 = 1;
|
|
else
|
|
tbl->is_ht40 = 0;
|
|
|
|
if (is_green)
|
|
tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/
|
|
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask);
|
|
if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
|
|
IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n",
|
|
rate, rate_mask);
|
|
return -1;
|
|
}
|
|
tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
|
|
IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
|
|
tbl->current_rate, is_green);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Try to switch to new modulation mode from legacy
|
|
*/
|
|
static int rs_move_legacy_other(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta,
|
|
int index)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct iwl_scale_tbl_info *search_tbl =
|
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
struct iwl_rate_scale_data *window = &(tbl->win[index]);
|
|
u32 sz = (sizeof(struct iwl_scale_tbl_info) -
|
|
(sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
|
|
u8 start_action;
|
|
u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
u8 tx_chains_num = hw_params(priv).tx_chains_num;
|
|
int ret = 0;
|
|
u8 update_search_tbl_counter = 0;
|
|
|
|
switch (priv->bt_traffic_load) {
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
|
|
/* nothing */
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
|
|
/* avoid antenna B unless MIMO */
|
|
if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2)
|
|
tbl->action = IWL_LEGACY_SWITCH_SISO;
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
|
|
/* avoid antenna B and MIMO */
|
|
valid_tx_ant =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 &&
|
|
tbl->action != IWL_LEGACY_SWITCH_SISO)
|
|
tbl->action = IWL_LEGACY_SWITCH_SISO;
|
|
break;
|
|
default:
|
|
IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
|
|
break;
|
|
}
|
|
|
|
if (!iwl_ht_enabled(priv))
|
|
/* stay in Legacy */
|
|
tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
|
|
else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
|
|
tbl->action > IWL_LEGACY_SWITCH_SISO)
|
|
tbl->action = IWL_LEGACY_SWITCH_SISO;
|
|
|
|
/* configure as 1x1 if bt full concurrency */
|
|
if (priv->bt_full_concurrent) {
|
|
if (!iwl_ht_enabled(priv))
|
|
tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
|
|
else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
|
|
tbl->action = IWL_LEGACY_SWITCH_SISO;
|
|
valid_tx_ant =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
}
|
|
|
|
start_action = tbl->action;
|
|
for (; ;) {
|
|
lq_sta->action_counter++;
|
|
switch (tbl->action) {
|
|
case IWL_LEGACY_SWITCH_ANTENNA1:
|
|
case IWL_LEGACY_SWITCH_ANTENNA2:
|
|
IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n");
|
|
|
|
if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 &&
|
|
tx_chains_num <= 1) ||
|
|
(tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 &&
|
|
tx_chains_num <= 2))
|
|
break;
|
|
|
|
/* Don't change antenna if success has been great */
|
|
if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
|
|
!priv->bt_full_concurrent &&
|
|
priv->bt_traffic_load ==
|
|
IWL_BT_COEX_TRAFFIC_LOAD_NONE)
|
|
break;
|
|
|
|
/* Set up search table to try other antenna */
|
|
memcpy(search_tbl, tbl, sz);
|
|
|
|
if (rs_toggle_antenna(valid_tx_ant,
|
|
&search_tbl->current_rate, search_tbl)) {
|
|
update_search_tbl_counter = 1;
|
|
rs_set_expected_tpt_table(lq_sta, search_tbl);
|
|
goto out;
|
|
}
|
|
break;
|
|
case IWL_LEGACY_SWITCH_SISO:
|
|
IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n");
|
|
|
|
/* Set up search table to try SISO */
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret) {
|
|
lq_sta->action_counter = 0;
|
|
goto out;
|
|
}
|
|
|
|
break;
|
|
case IWL_LEGACY_SWITCH_MIMO2_AB:
|
|
case IWL_LEGACY_SWITCH_MIMO2_AC:
|
|
case IWL_LEGACY_SWITCH_MIMO2_BC:
|
|
IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n");
|
|
|
|
/* Set up search table to try MIMO */
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
|
|
if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB)
|
|
search_tbl->ant_type = ANT_AB;
|
|
else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC)
|
|
search_tbl->ant_type = ANT_AC;
|
|
else
|
|
search_tbl->ant_type = ANT_BC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret) {
|
|
lq_sta->action_counter = 0;
|
|
goto out;
|
|
}
|
|
break;
|
|
|
|
case IWL_LEGACY_SWITCH_MIMO3_ABC:
|
|
IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n");
|
|
|
|
/* Set up search table to try MIMO3 */
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
|
|
search_tbl->ant_type = ANT_ABC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret) {
|
|
lq_sta->action_counter = 0;
|
|
goto out;
|
|
}
|
|
break;
|
|
}
|
|
tbl->action++;
|
|
if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
|
|
|
|
if (tbl->action == start_action)
|
|
break;
|
|
|
|
}
|
|
search_tbl->lq_type = LQ_NONE;
|
|
return 0;
|
|
|
|
out:
|
|
lq_sta->search_better_tbl = 1;
|
|
tbl->action++;
|
|
if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
|
|
if (update_search_tbl_counter)
|
|
search_tbl->action = tbl->action;
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Try to switch to new modulation mode from SISO
|
|
*/
|
|
static int rs_move_siso_to_other(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta, int index)
|
|
{
|
|
u8 is_green = lq_sta->is_green;
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct iwl_scale_tbl_info *search_tbl =
|
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
struct iwl_rate_scale_data *window = &(tbl->win[index]);
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
|
|
u32 sz = (sizeof(struct iwl_scale_tbl_info) -
|
|
(sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
|
|
u8 start_action;
|
|
u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
u8 tx_chains_num = hw_params(priv).tx_chains_num;
|
|
u8 update_search_tbl_counter = 0;
|
|
int ret;
|
|
|
|
switch (priv->bt_traffic_load) {
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
|
|
/* nothing */
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
|
|
/* avoid antenna B unless MIMO */
|
|
if (tbl->action == IWL_SISO_SWITCH_ANTENNA2)
|
|
tbl->action = IWL_SISO_SWITCH_MIMO2_AB;
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
|
|
/* avoid antenna B and MIMO */
|
|
valid_tx_ant =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
if (tbl->action != IWL_SISO_SWITCH_ANTENNA1)
|
|
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
|
|
break;
|
|
default:
|
|
IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
|
|
break;
|
|
}
|
|
|
|
if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
|
|
tbl->action > IWL_SISO_SWITCH_ANTENNA2) {
|
|
/* stay in SISO */
|
|
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
|
|
}
|
|
|
|
/* configure as 1x1 if bt full concurrency */
|
|
if (priv->bt_full_concurrent) {
|
|
valid_tx_ant =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
|
|
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
|
|
}
|
|
|
|
start_action = tbl->action;
|
|
for (;;) {
|
|
lq_sta->action_counter++;
|
|
switch (tbl->action) {
|
|
case IWL_SISO_SWITCH_ANTENNA1:
|
|
case IWL_SISO_SWITCH_ANTENNA2:
|
|
IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n");
|
|
if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 &&
|
|
tx_chains_num <= 1) ||
|
|
(tbl->action == IWL_SISO_SWITCH_ANTENNA2 &&
|
|
tx_chains_num <= 2))
|
|
break;
|
|
|
|
if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
|
|
!priv->bt_full_concurrent &&
|
|
priv->bt_traffic_load ==
|
|
IWL_BT_COEX_TRAFFIC_LOAD_NONE)
|
|
break;
|
|
|
|
memcpy(search_tbl, tbl, sz);
|
|
if (rs_toggle_antenna(valid_tx_ant,
|
|
&search_tbl->current_rate, search_tbl)) {
|
|
update_search_tbl_counter = 1;
|
|
goto out;
|
|
}
|
|
break;
|
|
case IWL_SISO_SWITCH_MIMO2_AB:
|
|
case IWL_SISO_SWITCH_MIMO2_AC:
|
|
case IWL_SISO_SWITCH_MIMO2_BC:
|
|
IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n");
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
|
|
if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB)
|
|
search_tbl->ant_type = ANT_AB;
|
|
else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC)
|
|
search_tbl->ant_type = ANT_AC;
|
|
else
|
|
search_tbl->ant_type = ANT_BC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
break;
|
|
case IWL_SISO_SWITCH_GI:
|
|
if (!tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_20))
|
|
break;
|
|
if (tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_40))
|
|
break;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n");
|
|
|
|
memcpy(search_tbl, tbl, sz);
|
|
if (is_green) {
|
|
if (!tbl->is_SGI)
|
|
break;
|
|
else
|
|
IWL_ERR(priv,
|
|
"SGI was set in GF+SISO\n");
|
|
}
|
|
search_tbl->is_SGI = !tbl->is_SGI;
|
|
rs_set_expected_tpt_table(lq_sta, search_tbl);
|
|
if (tbl->is_SGI) {
|
|
s32 tpt = lq_sta->last_tpt / 100;
|
|
if (tpt >= search_tbl->expected_tpt[index])
|
|
break;
|
|
}
|
|
search_tbl->current_rate =
|
|
rate_n_flags_from_tbl(priv, search_tbl,
|
|
index, is_green);
|
|
update_search_tbl_counter = 1;
|
|
goto out;
|
|
case IWL_SISO_SWITCH_MIMO3_ABC:
|
|
IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n");
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
search_tbl->ant_type = ANT_ABC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
break;
|
|
}
|
|
tbl->action++;
|
|
if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
|
|
|
|
if (tbl->action == start_action)
|
|
break;
|
|
}
|
|
search_tbl->lq_type = LQ_NONE;
|
|
return 0;
|
|
|
|
out:
|
|
lq_sta->search_better_tbl = 1;
|
|
tbl->action++;
|
|
if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
|
|
if (update_search_tbl_counter)
|
|
search_tbl->action = tbl->action;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Try to switch to new modulation mode from MIMO2
|
|
*/
|
|
static int rs_move_mimo2_to_other(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta, int index)
|
|
{
|
|
s8 is_green = lq_sta->is_green;
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct iwl_scale_tbl_info *search_tbl =
|
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
struct iwl_rate_scale_data *window = &(tbl->win[index]);
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
|
|
u32 sz = (sizeof(struct iwl_scale_tbl_info) -
|
|
(sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
|
|
u8 start_action;
|
|
u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
u8 tx_chains_num = hw_params(priv).tx_chains_num;
|
|
u8 update_search_tbl_counter = 0;
|
|
int ret;
|
|
|
|
switch (priv->bt_traffic_load) {
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
|
|
/* nothing */
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
|
|
/* avoid antenna B and MIMO */
|
|
if (tbl->action != IWL_MIMO2_SWITCH_SISO_A)
|
|
tbl->action = IWL_MIMO2_SWITCH_SISO_A;
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
|
|
/* avoid antenna B unless MIMO */
|
|
if (tbl->action == IWL_MIMO2_SWITCH_SISO_B ||
|
|
tbl->action == IWL_MIMO2_SWITCH_SISO_C)
|
|
tbl->action = IWL_MIMO2_SWITCH_SISO_A;
|
|
break;
|
|
default:
|
|
IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
|
|
break;
|
|
}
|
|
|
|
if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
|
|
(tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
|
|
tbl->action > IWL_MIMO2_SWITCH_SISO_C)) {
|
|
/* switch in SISO */
|
|
tbl->action = IWL_MIMO2_SWITCH_SISO_A;
|
|
}
|
|
|
|
/* configure as 1x1 if bt full concurrency */
|
|
if (priv->bt_full_concurrent &&
|
|
(tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
|
|
tbl->action > IWL_MIMO2_SWITCH_SISO_C))
|
|
tbl->action = IWL_MIMO2_SWITCH_SISO_A;
|
|
|
|
start_action = tbl->action;
|
|
for (;;) {
|
|
lq_sta->action_counter++;
|
|
switch (tbl->action) {
|
|
case IWL_MIMO2_SWITCH_ANTENNA1:
|
|
case IWL_MIMO2_SWITCH_ANTENNA2:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n");
|
|
|
|
if (tx_chains_num <= 2)
|
|
break;
|
|
|
|
if (window->success_ratio >= IWL_RS_GOOD_RATIO)
|
|
break;
|
|
|
|
memcpy(search_tbl, tbl, sz);
|
|
if (rs_toggle_antenna(valid_tx_ant,
|
|
&search_tbl->current_rate, search_tbl)) {
|
|
update_search_tbl_counter = 1;
|
|
goto out;
|
|
}
|
|
break;
|
|
case IWL_MIMO2_SWITCH_SISO_A:
|
|
case IWL_MIMO2_SWITCH_SISO_B:
|
|
case IWL_MIMO2_SWITCH_SISO_C:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n");
|
|
|
|
/* Set up new search table for SISO */
|
|
memcpy(search_tbl, tbl, sz);
|
|
|
|
if (tbl->action == IWL_MIMO2_SWITCH_SISO_A)
|
|
search_tbl->ant_type = ANT_A;
|
|
else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B)
|
|
search_tbl->ant_type = ANT_B;
|
|
else
|
|
search_tbl->ant_type = ANT_C;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
|
|
break;
|
|
|
|
case IWL_MIMO2_SWITCH_GI:
|
|
if (!tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_20))
|
|
break;
|
|
if (tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_40))
|
|
break;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n");
|
|
|
|
/* Set up new search table for MIMO2 */
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = !tbl->is_SGI;
|
|
rs_set_expected_tpt_table(lq_sta, search_tbl);
|
|
/*
|
|
* If active table already uses the fastest possible
|
|
* modulation (dual stream with short guard interval),
|
|
* and it's working well, there's no need to look
|
|
* for a better type of modulation!
|
|
*/
|
|
if (tbl->is_SGI) {
|
|
s32 tpt = lq_sta->last_tpt / 100;
|
|
if (tpt >= search_tbl->expected_tpt[index])
|
|
break;
|
|
}
|
|
search_tbl->current_rate =
|
|
rate_n_flags_from_tbl(priv, search_tbl,
|
|
index, is_green);
|
|
update_search_tbl_counter = 1;
|
|
goto out;
|
|
|
|
case IWL_MIMO2_SWITCH_MIMO3_ABC:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n");
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
search_tbl->ant_type = ANT_ABC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
|
|
break;
|
|
}
|
|
tbl->action++;
|
|
if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
|
|
|
|
if (tbl->action == start_action)
|
|
break;
|
|
}
|
|
search_tbl->lq_type = LQ_NONE;
|
|
return 0;
|
|
out:
|
|
lq_sta->search_better_tbl = 1;
|
|
tbl->action++;
|
|
if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
|
|
tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
|
|
if (update_search_tbl_counter)
|
|
search_tbl->action = tbl->action;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Try to switch to new modulation mode from MIMO3
|
|
*/
|
|
static int rs_move_mimo3_to_other(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta, int index)
|
|
{
|
|
s8 is_green = lq_sta->is_green;
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
struct iwl_scale_tbl_info *search_tbl =
|
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
struct iwl_rate_scale_data *window = &(tbl->win[index]);
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
|
|
u32 sz = (sizeof(struct iwl_scale_tbl_info) -
|
|
(sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
|
|
u8 start_action;
|
|
u8 valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
u8 tx_chains_num = hw_params(priv).tx_chains_num;
|
|
int ret;
|
|
u8 update_search_tbl_counter = 0;
|
|
|
|
switch (priv->bt_traffic_load) {
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
|
|
/* nothing */
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
|
|
/* avoid antenna B and MIMO */
|
|
if (tbl->action != IWL_MIMO3_SWITCH_SISO_A)
|
|
tbl->action = IWL_MIMO3_SWITCH_SISO_A;
|
|
break;
|
|
case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
|
|
/* avoid antenna B unless MIMO */
|
|
if (tbl->action == IWL_MIMO3_SWITCH_SISO_B ||
|
|
tbl->action == IWL_MIMO3_SWITCH_SISO_C)
|
|
tbl->action = IWL_MIMO3_SWITCH_SISO_A;
|
|
break;
|
|
default:
|
|
IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load);
|
|
break;
|
|
}
|
|
|
|
if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) &&
|
|
(tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
|
|
tbl->action > IWL_MIMO3_SWITCH_SISO_C)) {
|
|
/* switch in SISO */
|
|
tbl->action = IWL_MIMO3_SWITCH_SISO_A;
|
|
}
|
|
|
|
/* configure as 1x1 if bt full concurrency */
|
|
if (priv->bt_full_concurrent &&
|
|
(tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
|
|
tbl->action > IWL_MIMO3_SWITCH_SISO_C))
|
|
tbl->action = IWL_MIMO3_SWITCH_SISO_A;
|
|
|
|
start_action = tbl->action;
|
|
for (;;) {
|
|
lq_sta->action_counter++;
|
|
switch (tbl->action) {
|
|
case IWL_MIMO3_SWITCH_ANTENNA1:
|
|
case IWL_MIMO3_SWITCH_ANTENNA2:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n");
|
|
|
|
if (tx_chains_num <= 3)
|
|
break;
|
|
|
|
if (window->success_ratio >= IWL_RS_GOOD_RATIO)
|
|
break;
|
|
|
|
memcpy(search_tbl, tbl, sz);
|
|
if (rs_toggle_antenna(valid_tx_ant,
|
|
&search_tbl->current_rate, search_tbl))
|
|
goto out;
|
|
break;
|
|
case IWL_MIMO3_SWITCH_SISO_A:
|
|
case IWL_MIMO3_SWITCH_SISO_B:
|
|
case IWL_MIMO3_SWITCH_SISO_C:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n");
|
|
|
|
/* Set up new search table for SISO */
|
|
memcpy(search_tbl, tbl, sz);
|
|
|
|
if (tbl->action == IWL_MIMO3_SWITCH_SISO_A)
|
|
search_tbl->ant_type = ANT_A;
|
|
else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B)
|
|
search_tbl->ant_type = ANT_B;
|
|
else
|
|
search_tbl->ant_type = ANT_C;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
|
|
break;
|
|
|
|
case IWL_MIMO3_SWITCH_MIMO2_AB:
|
|
case IWL_MIMO3_SWITCH_MIMO2_AC:
|
|
case IWL_MIMO3_SWITCH_MIMO2_BC:
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n");
|
|
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = 0;
|
|
if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB)
|
|
search_tbl->ant_type = ANT_AB;
|
|
else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC)
|
|
search_tbl->ant_type = ANT_AC;
|
|
else
|
|
search_tbl->ant_type = ANT_BC;
|
|
|
|
if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
|
|
break;
|
|
|
|
ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
|
|
search_tbl, index);
|
|
if (!ret)
|
|
goto out;
|
|
|
|
break;
|
|
|
|
case IWL_MIMO3_SWITCH_GI:
|
|
if (!tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_20))
|
|
break;
|
|
if (tbl->is_ht40 && !(ht_cap->cap &
|
|
IEEE80211_HT_CAP_SGI_40))
|
|
break;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n");
|
|
|
|
/* Set up new search table for MIMO */
|
|
memcpy(search_tbl, tbl, sz);
|
|
search_tbl->is_SGI = !tbl->is_SGI;
|
|
rs_set_expected_tpt_table(lq_sta, search_tbl);
|
|
/*
|
|
* If active table already uses the fastest possible
|
|
* modulation (dual stream with short guard interval),
|
|
* and it's working well, there's no need to look
|
|
* for a better type of modulation!
|
|
*/
|
|
if (tbl->is_SGI) {
|
|
s32 tpt = lq_sta->last_tpt / 100;
|
|
if (tpt >= search_tbl->expected_tpt[index])
|
|
break;
|
|
}
|
|
search_tbl->current_rate =
|
|
rate_n_flags_from_tbl(priv, search_tbl,
|
|
index, is_green);
|
|
update_search_tbl_counter = 1;
|
|
goto out;
|
|
}
|
|
tbl->action++;
|
|
if (tbl->action > IWL_MIMO3_SWITCH_GI)
|
|
tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
|
|
|
|
if (tbl->action == start_action)
|
|
break;
|
|
}
|
|
search_tbl->lq_type = LQ_NONE;
|
|
return 0;
|
|
out:
|
|
lq_sta->search_better_tbl = 1;
|
|
tbl->action++;
|
|
if (tbl->action > IWL_MIMO3_SWITCH_GI)
|
|
tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
|
|
if (update_search_tbl_counter)
|
|
search_tbl->action = tbl->action;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Check whether we should continue using same modulation mode, or
|
|
* begin search for a new mode, based on:
|
|
* 1) # tx successes or failures while using this mode
|
|
* 2) # times calling this function
|
|
* 3) elapsed time in this mode (not used, for now)
|
|
*/
|
|
static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl;
|
|
int i;
|
|
int active_tbl;
|
|
int flush_interval_passed = 0;
|
|
struct iwl_priv *priv;
|
|
|
|
priv = lq_sta->drv;
|
|
active_tbl = lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
|
|
/* If we've been disallowing search, see if we should now allow it */
|
|
if (lq_sta->stay_in_tbl) {
|
|
|
|
/* Elapsed time using current modulation mode */
|
|
if (lq_sta->flush_timer)
|
|
flush_interval_passed =
|
|
time_after(jiffies,
|
|
(unsigned long)(lq_sta->flush_timer +
|
|
IWL_RATE_SCALE_FLUSH_INTVL));
|
|
|
|
/*
|
|
* Check if we should allow search for new modulation mode.
|
|
* If many frames have failed or succeeded, or we've used
|
|
* this same modulation for a long time, allow search, and
|
|
* reset history stats that keep track of whether we should
|
|
* allow a new search. Also (below) reset all bitmaps and
|
|
* stats in active history.
|
|
*/
|
|
if (force_search ||
|
|
(lq_sta->total_failed > lq_sta->max_failure_limit) ||
|
|
(lq_sta->total_success > lq_sta->max_success_limit) ||
|
|
((!lq_sta->search_better_tbl) && (lq_sta->flush_timer)
|
|
&& (flush_interval_passed))) {
|
|
IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:",
|
|
lq_sta->total_failed,
|
|
lq_sta->total_success,
|
|
flush_interval_passed);
|
|
|
|
/* Allow search for new mode */
|
|
lq_sta->stay_in_tbl = 0; /* only place reset */
|
|
lq_sta->total_failed = 0;
|
|
lq_sta->total_success = 0;
|
|
lq_sta->flush_timer = 0;
|
|
|
|
/*
|
|
* Else if we've used this modulation mode enough repetitions
|
|
* (regardless of elapsed time or success/failure), reset
|
|
* history bitmaps and rate-specific stats for all rates in
|
|
* active table.
|
|
*/
|
|
} else {
|
|
lq_sta->table_count++;
|
|
if (lq_sta->table_count >=
|
|
lq_sta->table_count_limit) {
|
|
lq_sta->table_count = 0;
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n");
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(
|
|
&(tbl->win[i]));
|
|
}
|
|
}
|
|
|
|
/* If transitioning to allow "search", reset all history
|
|
* bitmaps and stats in active table (this will become the new
|
|
* "search" table). */
|
|
if (!lq_sta->stay_in_tbl) {
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(&(tbl->win[i]));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* setup rate table in uCode
|
|
*/
|
|
static void rs_update_rate_tbl(struct iwl_priv *priv,
|
|
struct iwl_rxon_context *ctx,
|
|
struct iwl_lq_sta *lq_sta,
|
|
struct iwl_scale_tbl_info *tbl,
|
|
int index, u8 is_green)
|
|
{
|
|
u32 rate;
|
|
|
|
/* Update uCode's rate table. */
|
|
rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
|
|
rs_fill_link_cmd(priv, lq_sta, rate);
|
|
iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
|
|
}
|
|
|
|
/*
|
|
* Do rate scaling and search for new modulation mode.
|
|
*/
|
|
static void rs_rate_scale_perform(struct iwl_priv *priv,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct ieee80211_hw *hw = priv->hw;
|
|
struct ieee80211_conf *conf = &hw->conf;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
int low = IWL_RATE_INVALID;
|
|
int high = IWL_RATE_INVALID;
|
|
int index;
|
|
int i;
|
|
struct iwl_rate_scale_data *window = NULL;
|
|
int current_tpt = IWL_INVALID_VALUE;
|
|
int low_tpt = IWL_INVALID_VALUE;
|
|
int high_tpt = IWL_INVALID_VALUE;
|
|
u32 fail_count;
|
|
s8 scale_action = 0;
|
|
u16 rate_mask;
|
|
u8 update_lq = 0;
|
|
struct iwl_scale_tbl_info *tbl, *tbl1;
|
|
u16 rate_scale_index_msk = 0;
|
|
u8 is_green = 0;
|
|
u8 active_tbl = 0;
|
|
u8 done_search = 0;
|
|
u16 high_low;
|
|
s32 sr;
|
|
u8 tid = IWL_MAX_TID_COUNT;
|
|
struct iwl_tid_data *tid_data;
|
|
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
|
|
struct iwl_rxon_context *ctx = sta_priv->ctx;
|
|
|
|
IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n");
|
|
|
|
/* Send management frames and NO_ACK data using lowest rate. */
|
|
/* TODO: this could probably be improved.. */
|
|
if (!ieee80211_is_data(hdr->frame_control) ||
|
|
info->flags & IEEE80211_TX_CTL_NO_ACK)
|
|
return;
|
|
|
|
lq_sta->supp_rates = sta->supp_rates[lq_sta->band];
|
|
|
|
tid = rs_tl_add_packet(lq_sta, hdr);
|
|
if ((tid != IWL_MAX_TID_COUNT) &&
|
|
(lq_sta->tx_agg_tid_en & (1 << tid))) {
|
|
tid_data = &priv->tid_data[lq_sta->lq.sta_id][tid];
|
|
if (tid_data->agg.state == IWL_AGG_OFF)
|
|
lq_sta->is_agg = 0;
|
|
else
|
|
lq_sta->is_agg = 1;
|
|
} else
|
|
lq_sta->is_agg = 0;
|
|
|
|
/*
|
|
* Select rate-scale / modulation-mode table to work with in
|
|
* the rest of this function: "search" if searching for better
|
|
* modulation mode, or "active" if doing rate scaling within a mode.
|
|
*/
|
|
if (!lq_sta->search_better_tbl)
|
|
active_tbl = lq_sta->active_tbl;
|
|
else
|
|
active_tbl = 1 - lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
if (is_legacy(tbl->lq_type))
|
|
lq_sta->is_green = 0;
|
|
else
|
|
lq_sta->is_green = rs_use_green(sta);
|
|
is_green = lq_sta->is_green;
|
|
|
|
/* current tx rate */
|
|
index = lq_sta->last_txrate_idx;
|
|
|
|
IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index,
|
|
tbl->lq_type);
|
|
|
|
/* rates available for this association, and for modulation mode */
|
|
rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
|
|
|
|
IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask);
|
|
|
|
/* mask with station rate restriction */
|
|
if (is_legacy(tbl->lq_type)) {
|
|
if (lq_sta->band == IEEE80211_BAND_5GHZ)
|
|
/* supp_rates has no CCK bits in A mode */
|
|
rate_scale_index_msk = (u16) (rate_mask &
|
|
(lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
|
|
else
|
|
rate_scale_index_msk = (u16) (rate_mask &
|
|
lq_sta->supp_rates);
|
|
|
|
} else
|
|
rate_scale_index_msk = rate_mask;
|
|
|
|
if (!rate_scale_index_msk)
|
|
rate_scale_index_msk = rate_mask;
|
|
|
|
if (!((1 << index) & rate_scale_index_msk)) {
|
|
IWL_ERR(priv, "Current Rate is not valid\n");
|
|
if (lq_sta->search_better_tbl) {
|
|
/* revert to active table if search table is not valid*/
|
|
tbl->lq_type = LQ_NONE;
|
|
lq_sta->search_better_tbl = 0;
|
|
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
/* get "active" rate info */
|
|
index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
|
|
rs_update_rate_tbl(priv, ctx, lq_sta, tbl,
|
|
index, is_green);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Get expected throughput table and history window for current rate */
|
|
if (!tbl->expected_tpt) {
|
|
IWL_ERR(priv, "tbl->expected_tpt is NULL\n");
|
|
return;
|
|
}
|
|
|
|
/* force user max rate if set by user */
|
|
if ((lq_sta->max_rate_idx != -1) &&
|
|
(lq_sta->max_rate_idx < index)) {
|
|
index = lq_sta->max_rate_idx;
|
|
update_lq = 1;
|
|
window = &(tbl->win[index]);
|
|
goto lq_update;
|
|
}
|
|
|
|
window = &(tbl->win[index]);
|
|
|
|
/*
|
|
* If there is not enough history to calculate actual average
|
|
* throughput, keep analyzing results of more tx frames, without
|
|
* changing rate or mode (bypass most of the rest of this function).
|
|
* Set up new rate table in uCode only if old rate is not supported
|
|
* in current association (use new rate found above).
|
|
*/
|
|
fail_count = window->counter - window->success_counter;
|
|
if ((fail_count < IWL_RATE_MIN_FAILURE_TH) &&
|
|
(window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) {
|
|
IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d "
|
|
"for index %d\n",
|
|
window->success_counter, window->counter, index);
|
|
|
|
/* Can't calculate this yet; not enough history */
|
|
window->average_tpt = IWL_INVALID_VALUE;
|
|
|
|
/* Should we stay with this modulation mode,
|
|
* or search for a new one? */
|
|
rs_stay_in_table(lq_sta, false);
|
|
|
|
goto out;
|
|
}
|
|
/* Else we have enough samples; calculate estimate of
|
|
* actual average throughput */
|
|
if (window->average_tpt != ((window->success_ratio *
|
|
tbl->expected_tpt[index] + 64) / 128)) {
|
|
IWL_ERR(priv, "expected_tpt should have been calculated by now\n");
|
|
window->average_tpt = ((window->success_ratio *
|
|
tbl->expected_tpt[index] + 64) / 128);
|
|
}
|
|
|
|
/* If we are searching for better modulation mode, check success. */
|
|
if (lq_sta->search_better_tbl &&
|
|
(iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) {
|
|
/* If good success, continue using the "search" mode;
|
|
* no need to send new link quality command, since we're
|
|
* continuing to use the setup that we've been trying. */
|
|
if (window->average_tpt > lq_sta->last_tpt) {
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE "
|
|
"suc=%d cur-tpt=%d old-tpt=%d\n",
|
|
window->success_ratio,
|
|
window->average_tpt,
|
|
lq_sta->last_tpt);
|
|
|
|
if (!is_legacy(tbl->lq_type))
|
|
lq_sta->enable_counter = 1;
|
|
|
|
/* Swap tables; "search" becomes "active" */
|
|
lq_sta->active_tbl = active_tbl;
|
|
current_tpt = window->average_tpt;
|
|
|
|
/* Else poor success; go back to mode in "active" table */
|
|
} else {
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE "
|
|
"suc=%d cur-tpt=%d old-tpt=%d\n",
|
|
window->success_ratio,
|
|
window->average_tpt,
|
|
lq_sta->last_tpt);
|
|
|
|
/* Nullify "search" table */
|
|
tbl->lq_type = LQ_NONE;
|
|
|
|
/* Revert to "active" table */
|
|
active_tbl = lq_sta->active_tbl;
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
|
|
/* Revert to "active" rate and throughput info */
|
|
index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
|
|
current_tpt = lq_sta->last_tpt;
|
|
|
|
/* Need to set up a new rate table in uCode */
|
|
update_lq = 1;
|
|
}
|
|
|
|
/* Either way, we've made a decision; modulation mode
|
|
* search is done, allow rate adjustment next time. */
|
|
lq_sta->search_better_tbl = 0;
|
|
done_search = 1; /* Don't switch modes below! */
|
|
goto lq_update;
|
|
}
|
|
|
|
/* (Else) not in search of better modulation mode, try for better
|
|
* starting rate, while staying in this mode. */
|
|
high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk,
|
|
tbl->lq_type);
|
|
low = high_low & 0xff;
|
|
high = (high_low >> 8) & 0xff;
|
|
|
|
/* If user set max rate, dont allow higher than user constrain */
|
|
if ((lq_sta->max_rate_idx != -1) &&
|
|
(lq_sta->max_rate_idx < high))
|
|
high = IWL_RATE_INVALID;
|
|
|
|
sr = window->success_ratio;
|
|
|
|
/* Collect measured throughputs for current and adjacent rates */
|
|
current_tpt = window->average_tpt;
|
|
if (low != IWL_RATE_INVALID)
|
|
low_tpt = tbl->win[low].average_tpt;
|
|
if (high != IWL_RATE_INVALID)
|
|
high_tpt = tbl->win[high].average_tpt;
|
|
|
|
scale_action = 0;
|
|
|
|
/* Too many failures, decrease rate */
|
|
if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) {
|
|
IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n");
|
|
scale_action = -1;
|
|
|
|
/* No throughput measured yet for adjacent rates; try increase. */
|
|
} else if ((low_tpt == IWL_INVALID_VALUE) &&
|
|
(high_tpt == IWL_INVALID_VALUE)) {
|
|
|
|
if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH)
|
|
scale_action = 1;
|
|
else if (low != IWL_RATE_INVALID)
|
|
scale_action = 0;
|
|
}
|
|
|
|
/* Both adjacent throughputs are measured, but neither one has better
|
|
* throughput; we're using the best rate, don't change it! */
|
|
else if ((low_tpt != IWL_INVALID_VALUE) &&
|
|
(high_tpt != IWL_INVALID_VALUE) &&
|
|
(low_tpt < current_tpt) &&
|
|
(high_tpt < current_tpt))
|
|
scale_action = 0;
|
|
|
|
/* At least one adjacent rate's throughput is measured,
|
|
* and may have better performance. */
|
|
else {
|
|
/* Higher adjacent rate's throughput is measured */
|
|
if (high_tpt != IWL_INVALID_VALUE) {
|
|
/* Higher rate has better throughput */
|
|
if (high_tpt > current_tpt &&
|
|
sr >= IWL_RATE_INCREASE_TH) {
|
|
scale_action = 1;
|
|
} else {
|
|
scale_action = 0;
|
|
}
|
|
|
|
/* Lower adjacent rate's throughput is measured */
|
|
} else if (low_tpt != IWL_INVALID_VALUE) {
|
|
/* Lower rate has better throughput */
|
|
if (low_tpt > current_tpt) {
|
|
IWL_DEBUG_RATE(priv,
|
|
"decrease rate because of low tpt\n");
|
|
scale_action = -1;
|
|
} else if (sr >= IWL_RATE_INCREASE_TH) {
|
|
scale_action = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Sanity check; asked for decrease, but success rate or throughput
|
|
* has been good at old rate. Don't change it. */
|
|
if ((scale_action == -1) && (low != IWL_RATE_INVALID) &&
|
|
((sr > IWL_RATE_HIGH_TH) ||
|
|
(current_tpt > (100 * tbl->expected_tpt[low]))))
|
|
scale_action = 0;
|
|
if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type))
|
|
scale_action = -1;
|
|
if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI &&
|
|
(is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type)))
|
|
scale_action = -1;
|
|
|
|
if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
|
|
(is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
|
|
if (lq_sta->last_bt_traffic > priv->bt_traffic_load) {
|
|
/*
|
|
* don't set scale_action, don't want to scale up if
|
|
* the rate scale doesn't otherwise think that is a
|
|
* good idea.
|
|
*/
|
|
} else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) {
|
|
scale_action = -1;
|
|
}
|
|
}
|
|
lq_sta->last_bt_traffic = priv->bt_traffic_load;
|
|
|
|
if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
|
|
(is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
|
|
/* search for a new modulation */
|
|
rs_stay_in_table(lq_sta, true);
|
|
goto lq_update;
|
|
}
|
|
|
|
switch (scale_action) {
|
|
case -1:
|
|
/* Decrease starting rate, update uCode's rate table */
|
|
if (low != IWL_RATE_INVALID) {
|
|
update_lq = 1;
|
|
index = low;
|
|
}
|
|
|
|
break;
|
|
case 1:
|
|
/* Increase starting rate, update uCode's rate table */
|
|
if (high != IWL_RATE_INVALID) {
|
|
update_lq = 1;
|
|
index = high;
|
|
}
|
|
|
|
break;
|
|
case 0:
|
|
/* No change */
|
|
default:
|
|
break;
|
|
}
|
|
|
|
IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d "
|
|
"high %d type %d\n",
|
|
index, scale_action, low, high, tbl->lq_type);
|
|
|
|
lq_update:
|
|
/* Replace uCode's rate table for the destination station. */
|
|
if (update_lq)
|
|
rs_update_rate_tbl(priv, ctx, lq_sta, tbl, index, is_green);
|
|
|
|
if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) {
|
|
/* Should we stay with this modulation mode,
|
|
* or search for a new one? */
|
|
rs_stay_in_table(lq_sta, false);
|
|
}
|
|
/*
|
|
* Search for new modulation mode if we're:
|
|
* 1) Not changing rates right now
|
|
* 2) Not just finishing up a search
|
|
* 3) Allowing a new search
|
|
*/
|
|
if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) {
|
|
/* Save current throughput to compare with "search" throughput*/
|
|
lq_sta->last_tpt = current_tpt;
|
|
|
|
/* Select a new "search" modulation mode to try.
|
|
* If one is found, set up the new "search" table. */
|
|
if (is_legacy(tbl->lq_type))
|
|
rs_move_legacy_other(priv, lq_sta, conf, sta, index);
|
|
else if (is_siso(tbl->lq_type))
|
|
rs_move_siso_to_other(priv, lq_sta, conf, sta, index);
|
|
else if (is_mimo2(tbl->lq_type))
|
|
rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index);
|
|
else
|
|
rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index);
|
|
|
|
/* If new "search" mode was selected, set up in uCode table */
|
|
if (lq_sta->search_better_tbl) {
|
|
/* Access the "search" table, clear its history. */
|
|
tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(&(tbl->win[i]));
|
|
|
|
/* Use new "search" start rate */
|
|
index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
|
|
|
|
IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n",
|
|
tbl->current_rate, index);
|
|
rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
|
|
iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false);
|
|
} else
|
|
done_search = 1;
|
|
}
|
|
|
|
if (done_search && !lq_sta->stay_in_tbl) {
|
|
/* If the "active" (non-search) mode was legacy,
|
|
* and we've tried switching antennas,
|
|
* but we haven't been able to try HT modes (not available),
|
|
* stay with best antenna legacy modulation for a while
|
|
* before next round of mode comparisons. */
|
|
tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
|
|
lq_sta->action_counter > tbl1->max_search) {
|
|
IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n");
|
|
rs_set_stay_in_table(priv, 1, lq_sta);
|
|
}
|
|
|
|
/* If we're in an HT mode, and all 3 mode switch actions
|
|
* have been tried and compared, stay in this best modulation
|
|
* mode for a while before next round of mode comparisons. */
|
|
if (lq_sta->enable_counter &&
|
|
(lq_sta->action_counter >= tbl1->max_search) &&
|
|
iwl_ht_enabled(priv)) {
|
|
if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
|
|
(lq_sta->tx_agg_tid_en & (1 << tid)) &&
|
|
(tid != IWL_MAX_TID_COUNT)) {
|
|
u8 sta_id = lq_sta->lq.sta_id;
|
|
tid_data = &priv->tid_data[sta_id][tid];
|
|
if (tid_data->agg.state == IWL_AGG_OFF) {
|
|
IWL_DEBUG_RATE(priv,
|
|
"try to aggregate tid %d\n",
|
|
tid);
|
|
rs_tl_turn_on_agg(priv, tid,
|
|
lq_sta, sta);
|
|
}
|
|
}
|
|
rs_set_stay_in_table(priv, 0, lq_sta);
|
|
}
|
|
}
|
|
|
|
out:
|
|
tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
|
|
lq_sta->last_txrate_idx = index;
|
|
}
|
|
|
|
/**
|
|
* rs_initialize_lq - Initialize a station's hardware rate table
|
|
*
|
|
* The uCode's station table contains a table of fallback rates
|
|
* for automatic fallback during transmission.
|
|
*
|
|
* NOTE: This sets up a default set of values. These will be replaced later
|
|
* if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
|
|
* rc80211_simple.
|
|
*
|
|
* NOTE: Run REPLY_ADD_STA command to set up station table entry, before
|
|
* calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
|
|
* which requires station table entry to exist).
|
|
*/
|
|
static void rs_initialize_lq(struct iwl_priv *priv,
|
|
struct ieee80211_conf *conf,
|
|
struct ieee80211_sta *sta,
|
|
struct iwl_lq_sta *lq_sta)
|
|
{
|
|
struct iwl_scale_tbl_info *tbl;
|
|
int rate_idx;
|
|
int i;
|
|
u32 rate;
|
|
u8 use_green = rs_use_green(sta);
|
|
u8 active_tbl = 0;
|
|
u8 valid_tx_ant;
|
|
struct iwl_station_priv *sta_priv;
|
|
struct iwl_rxon_context *ctx;
|
|
|
|
if (!sta || !lq_sta)
|
|
return;
|
|
|
|
sta_priv = (void *)sta->drv_priv;
|
|
ctx = sta_priv->ctx;
|
|
|
|
i = lq_sta->last_txrate_idx;
|
|
|
|
valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
|
|
if (!lq_sta->search_better_tbl)
|
|
active_tbl = lq_sta->active_tbl;
|
|
else
|
|
active_tbl = 1 - lq_sta->active_tbl;
|
|
|
|
tbl = &(lq_sta->lq_info[active_tbl]);
|
|
|
|
if ((i < 0) || (i >= IWL_RATE_COUNT))
|
|
i = 0;
|
|
|
|
rate = iwl_rates[i].plcp;
|
|
tbl->ant_type = first_antenna(valid_tx_ant);
|
|
rate |= tbl->ant_type << RATE_MCS_ANT_POS;
|
|
|
|
if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE)
|
|
rate |= RATE_MCS_CCK_MSK;
|
|
|
|
rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx);
|
|
if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
|
|
rs_toggle_antenna(valid_tx_ant, &rate, tbl);
|
|
|
|
rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green);
|
|
tbl->current_rate = rate;
|
|
rs_set_expected_tpt_table(lq_sta, tbl);
|
|
rs_fill_link_cmd(NULL, lq_sta, rate);
|
|
priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq;
|
|
iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true);
|
|
}
|
|
|
|
static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
|
|
struct ieee80211_tx_rate_control *txrc)
|
|
{
|
|
|
|
struct sk_buff *skb = txrc->skb;
|
|
struct ieee80211_supported_band *sband = txrc->sband;
|
|
struct iwl_priv *priv __maybe_unused = (struct iwl_priv *)priv_r;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct iwl_lq_sta *lq_sta = priv_sta;
|
|
int rate_idx;
|
|
|
|
IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n");
|
|
|
|
/* Get max rate if user set max rate */
|
|
if (lq_sta) {
|
|
lq_sta->max_rate_idx = txrc->max_rate_idx;
|
|
if ((sband->band == IEEE80211_BAND_5GHZ) &&
|
|
(lq_sta->max_rate_idx != -1))
|
|
lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE;
|
|
if ((lq_sta->max_rate_idx < 0) ||
|
|
(lq_sta->max_rate_idx >= IWL_RATE_COUNT))
|
|
lq_sta->max_rate_idx = -1;
|
|
}
|
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */
|
|
if (lq_sta && !lq_sta->drv) {
|
|
IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n");
|
|
priv_sta = NULL;
|
|
}
|
|
|
|
/* Send management frames and NO_ACK data using lowest rate. */
|
|
if (rate_control_send_low(sta, priv_sta, txrc))
|
|
return;
|
|
|
|
rate_idx = lq_sta->last_txrate_idx;
|
|
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
|
|
rate_idx -= IWL_FIRST_OFDM_RATE;
|
|
/* 6M and 9M shared same MCS index */
|
|
rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
|
|
if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
|
|
IWL_RATE_MIMO3_6M_PLCP)
|
|
rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM);
|
|
else if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
|
|
IWL_RATE_MIMO2_6M_PLCP)
|
|
rate_idx = rate_idx + MCS_INDEX_PER_STREAM;
|
|
info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
|
|
info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI;
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
|
|
info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA;
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK)
|
|
info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
|
|
info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD;
|
|
} else {
|
|
/* Check for invalid rates */
|
|
if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) ||
|
|
((sband->band == IEEE80211_BAND_5GHZ) &&
|
|
(rate_idx < IWL_FIRST_OFDM_RATE)))
|
|
rate_idx = rate_lowest_index(sband, sta);
|
|
/* On valid 5 GHz rate, adjust index */
|
|
else if (sband->band == IEEE80211_BAND_5GHZ)
|
|
rate_idx -= IWL_FIRST_OFDM_RATE;
|
|
info->control.rates[0].flags = 0;
|
|
}
|
|
info->control.rates[0].idx = rate_idx;
|
|
|
|
}
|
|
|
|
static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,
|
|
gfp_t gfp)
|
|
{
|
|
struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv;
|
|
struct iwl_priv *priv;
|
|
|
|
priv = (struct iwl_priv *)priv_rate;
|
|
IWL_DEBUG_RATE(priv, "create station rate scale window\n");
|
|
|
|
return &sta_priv->lq_sta;
|
|
}
|
|
|
|
/*
|
|
* Called after adding a new station to initialize rate scaling
|
|
*/
|
|
void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id)
|
|
{
|
|
int i, j;
|
|
struct ieee80211_hw *hw = priv->hw;
|
|
struct ieee80211_conf *conf = &priv->hw->conf;
|
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
|
|
struct iwl_station_priv *sta_priv;
|
|
struct iwl_lq_sta *lq_sta;
|
|
struct ieee80211_supported_band *sband;
|
|
|
|
sta_priv = (struct iwl_station_priv *) sta->drv_priv;
|
|
lq_sta = &sta_priv->lq_sta;
|
|
sband = hw->wiphy->bands[conf->channel->band];
|
|
|
|
|
|
lq_sta->lq.sta_id = sta_id;
|
|
|
|
for (j = 0; j < LQ_SIZE; j++)
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
|
|
|
|
lq_sta->flush_timer = 0;
|
|
lq_sta->supp_rates = sta->supp_rates[sband->band];
|
|
for (j = 0; j < LQ_SIZE; j++)
|
|
for (i = 0; i < IWL_RATE_COUNT; i++)
|
|
rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
|
|
|
|
IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n",
|
|
sta_id);
|
|
/* TODO: what is a good starting rate for STA? About middle? Maybe not
|
|
* the lowest or the highest rate.. Could consider using RSSI from
|
|
* previous packets? Need to have IEEE 802.1X auth succeed immediately
|
|
* after assoc.. */
|
|
|
|
lq_sta->is_dup = 0;
|
|
lq_sta->max_rate_idx = -1;
|
|
lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
|
|
lq_sta->is_green = rs_use_green(sta);
|
|
lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000);
|
|
lq_sta->band = priv->band;
|
|
/*
|
|
* active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
|
|
* supp_rates[] does not; shift to convert format, force 9 MBits off.
|
|
*/
|
|
lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
|
|
lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
|
|
lq_sta->active_siso_rate &= ~((u16)0x2);
|
|
lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
|
|
|
|
/* Same here */
|
|
lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
|
|
lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
|
|
lq_sta->active_mimo2_rate &= ~((u16)0x2);
|
|
lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
|
|
|
|
lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1;
|
|
lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1;
|
|
lq_sta->active_mimo3_rate &= ~((u16)0x2);
|
|
lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE;
|
|
|
|
IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n",
|
|
lq_sta->active_siso_rate,
|
|
lq_sta->active_mimo2_rate,
|
|
lq_sta->active_mimo3_rate);
|
|
|
|
/* These values will be overridden later */
|
|
lq_sta->lq.general_params.single_stream_ant_msk =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
lq_sta->lq.general_params.dual_stream_ant_msk =
|
|
hw_params(priv).valid_tx_ant &
|
|
~first_antenna(hw_params(priv).valid_tx_ant);
|
|
if (!lq_sta->lq.general_params.dual_stream_ant_msk) {
|
|
lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB;
|
|
} else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) {
|
|
lq_sta->lq.general_params.dual_stream_ant_msk =
|
|
hw_params(priv).valid_tx_ant;
|
|
}
|
|
|
|
/* as default allow aggregation for all tids */
|
|
lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
|
|
lq_sta->drv = priv;
|
|
|
|
/* Set last_txrate_idx to lowest rate */
|
|
lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
|
|
if (sband->band == IEEE80211_BAND_5GHZ)
|
|
lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
|
|
lq_sta->is_agg = 0;
|
|
#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
|
|
priv->tm_fixed_rate = 0;
|
|
#endif
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
lq_sta->dbg_fixed_rate = 0;
|
|
#endif
|
|
|
|
rs_initialize_lq(priv, conf, sta, lq_sta);
|
|
}
|
|
|
|
static void rs_fill_link_cmd(struct iwl_priv *priv,
|
|
struct iwl_lq_sta *lq_sta, u32 new_rate)
|
|
{
|
|
struct iwl_scale_tbl_info tbl_type;
|
|
int index = 0;
|
|
int rate_idx;
|
|
int repeat_rate = 0;
|
|
u8 ant_toggle_cnt = 0;
|
|
u8 use_ht_possible = 1;
|
|
u8 valid_tx_ant = 0;
|
|
struct iwl_station_priv *sta_priv =
|
|
container_of(lq_sta, struct iwl_station_priv, lq_sta);
|
|
struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq;
|
|
|
|
/* Override starting rate (index 0) if needed for debug purposes */
|
|
rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
|
|
|
|
/* Interpret new_rate (rate_n_flags) */
|
|
rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
|
|
&tbl_type, &rate_idx);
|
|
|
|
if (priv && priv->bt_full_concurrent) {
|
|
/* 1x1 only */
|
|
tbl_type.ant_type =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
}
|
|
|
|
/* How many times should we repeat the initial rate? */
|
|
if (is_legacy(tbl_type.lq_type)) {
|
|
ant_toggle_cnt = 1;
|
|
repeat_rate = IWL_NUMBER_TRY;
|
|
} else {
|
|
repeat_rate = min(IWL_HT_NUMBER_TRY,
|
|
LINK_QUAL_AGG_DISABLE_START_DEF - 1);
|
|
}
|
|
|
|
lq_cmd->general_params.mimo_delimiter =
|
|
is_mimo(tbl_type.lq_type) ? 1 : 0;
|
|
|
|
/* Fill 1st table entry (index 0) */
|
|
lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
|
|
|
|
if (num_of_ant(tbl_type.ant_type) == 1) {
|
|
lq_cmd->general_params.single_stream_ant_msk =
|
|
tbl_type.ant_type;
|
|
} else if (num_of_ant(tbl_type.ant_type) == 2) {
|
|
lq_cmd->general_params.dual_stream_ant_msk =
|
|
tbl_type.ant_type;
|
|
} /* otherwise we don't modify the existing value */
|
|
|
|
index++;
|
|
repeat_rate--;
|
|
if (priv) {
|
|
if (priv->bt_full_concurrent)
|
|
valid_tx_ant = ANT_A;
|
|
else
|
|
valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
}
|
|
|
|
/* Fill rest of rate table */
|
|
while (index < LINK_QUAL_MAX_RETRY_NUM) {
|
|
/* Repeat initial/next rate.
|
|
* For legacy IWL_NUMBER_TRY == 1, this loop will not execute.
|
|
* For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */
|
|
while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) {
|
|
if (is_legacy(tbl_type.lq_type)) {
|
|
if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
|
|
ant_toggle_cnt++;
|
|
else if (priv &&
|
|
rs_toggle_antenna(valid_tx_ant,
|
|
&new_rate, &tbl_type))
|
|
ant_toggle_cnt = 1;
|
|
}
|
|
|
|
/* Override next rate if needed for debug purposes */
|
|
rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
|
|
|
|
/* Fill next table entry */
|
|
lq_cmd->rs_table[index].rate_n_flags =
|
|
cpu_to_le32(new_rate);
|
|
repeat_rate--;
|
|
index++;
|
|
}
|
|
|
|
rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type,
|
|
&rate_idx);
|
|
|
|
if (priv && priv->bt_full_concurrent) {
|
|
/* 1x1 only */
|
|
tbl_type.ant_type =
|
|
first_antenna(hw_params(priv).valid_tx_ant);
|
|
}
|
|
|
|
/* Indicate to uCode which entries might be MIMO.
|
|
* If initial rate was MIMO, this will finally end up
|
|
* as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */
|
|
if (is_mimo(tbl_type.lq_type))
|
|
lq_cmd->general_params.mimo_delimiter = index;
|
|
|
|
/* Get next rate */
|
|
new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx,
|
|
use_ht_possible);
|
|
|
|
/* How many times should we repeat the next rate? */
|
|
if (is_legacy(tbl_type.lq_type)) {
|
|
if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
|
|
ant_toggle_cnt++;
|
|
else if (priv &&
|
|
rs_toggle_antenna(valid_tx_ant,
|
|
&new_rate, &tbl_type))
|
|
ant_toggle_cnt = 1;
|
|
|
|
repeat_rate = IWL_NUMBER_TRY;
|
|
} else {
|
|
repeat_rate = IWL_HT_NUMBER_TRY;
|
|
}
|
|
|
|
/* Don't allow HT rates after next pass.
|
|
* rs_get_lower_rate() will change type to LQ_A or LQ_G. */
|
|
use_ht_possible = 0;
|
|
|
|
/* Override next rate if needed for debug purposes */
|
|
rs_dbgfs_set_mcs(lq_sta, &new_rate, index);
|
|
|
|
/* Fill next table entry */
|
|
lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
|
|
|
|
index++;
|
|
repeat_rate--;
|
|
}
|
|
|
|
lq_cmd->agg_params.agg_frame_cnt_limit =
|
|
sta_priv->max_agg_bufsize ?: LINK_QUAL_AGG_FRAME_LIMIT_DEF;
|
|
lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
|
|
|
|
lq_cmd->agg_params.agg_time_limit =
|
|
cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
|
|
/*
|
|
* overwrite if needed, pass aggregation time limit
|
|
* to uCode in uSec
|
|
*/
|
|
if (priv && cfg(priv)->bt_params &&
|
|
cfg(priv)->bt_params->agg_time_limit &&
|
|
priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
|
|
lq_cmd->agg_params.agg_time_limit =
|
|
cpu_to_le16(cfg(priv)->bt_params->agg_time_limit);
|
|
}
|
|
|
|
static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
|
|
{
|
|
return hw->priv;
|
|
}
|
|
/* rate scale requires free function to be implemented */
|
|
static void rs_free(void *priv_rate)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta,
|
|
void *priv_sta)
|
|
{
|
|
struct iwl_priv *priv __maybe_unused = priv_r;
|
|
|
|
IWL_DEBUG_RATE(priv, "enter\n");
|
|
IWL_DEBUG_RATE(priv, "leave\n");
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
static int open_file_generic(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = inode->i_private;
|
|
return 0;
|
|
}
|
|
static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
|
|
u32 *rate_n_flags, int index)
|
|
{
|
|
struct iwl_priv *priv;
|
|
u8 valid_tx_ant;
|
|
u8 ant_sel_tx;
|
|
|
|
priv = lq_sta->drv;
|
|
valid_tx_ant = hw_params(priv).valid_tx_ant;
|
|
if (lq_sta->dbg_fixed_rate) {
|
|
ant_sel_tx =
|
|
((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK)
|
|
>> RATE_MCS_ANT_POS);
|
|
if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) {
|
|
*rate_n_flags = lq_sta->dbg_fixed_rate;
|
|
IWL_DEBUG_RATE(priv, "Fixed rate ON\n");
|
|
} else {
|
|
lq_sta->dbg_fixed_rate = 0;
|
|
IWL_ERR(priv,
|
|
"Invalid antenna selection 0x%X, Valid is 0x%X\n",
|
|
ant_sel_tx, valid_tx_ant);
|
|
IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
|
|
}
|
|
} else {
|
|
IWL_DEBUG_RATE(priv, "Fixed rate OFF\n");
|
|
}
|
|
}
|
|
|
|
static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
|
|
const char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct iwl_priv *priv;
|
|
char buf[64];
|
|
size_t buf_size;
|
|
u32 parsed_rate;
|
|
|
|
|
|
priv = lq_sta->drv;
|
|
memset(buf, 0, sizeof(buf));
|
|
buf_size = min(count, sizeof(buf) - 1);
|
|
if (copy_from_user(buf, user_buf, buf_size))
|
|
return -EFAULT;
|
|
|
|
if (sscanf(buf, "%x", &parsed_rate) == 1)
|
|
lq_sta->dbg_fixed_rate = parsed_rate;
|
|
else
|
|
lq_sta->dbg_fixed_rate = 0;
|
|
|
|
rs_program_fix_rate(priv, lq_sta);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
|
|
char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
char *buff;
|
|
int desc = 0;
|
|
int i = 0;
|
|
int index = 0;
|
|
ssize_t ret;
|
|
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct iwl_priv *priv;
|
|
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
|
|
|
|
priv = lq_sta->drv;
|
|
buff = kmalloc(1024, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id);
|
|
desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n",
|
|
lq_sta->total_failed, lq_sta->total_success,
|
|
lq_sta->active_legacy_rate);
|
|
desc += sprintf(buff+desc, "fixed rate 0x%X\n",
|
|
lq_sta->dbg_fixed_rate);
|
|
desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
|
|
(hw_params(priv).valid_tx_ant & ANT_A) ? "ANT_A," : "",
|
|
(hw_params(priv).valid_tx_ant & ANT_B) ? "ANT_B," : "",
|
|
(hw_params(priv).valid_tx_ant & ANT_C) ? "ANT_C" : "");
|
|
desc += sprintf(buff+desc, "lq type %s\n",
|
|
(is_legacy(tbl->lq_type)) ? "legacy" : "HT");
|
|
if (is_Ht(tbl->lq_type)) {
|
|
desc += sprintf(buff+desc, " %s",
|
|
(is_siso(tbl->lq_type)) ? "SISO" :
|
|
((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3"));
|
|
desc += sprintf(buff+desc, " %s",
|
|
(tbl->is_ht40) ? "40MHz" : "20MHz");
|
|
desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "",
|
|
(lq_sta->is_green) ? "GF enabled" : "",
|
|
(lq_sta->is_agg) ? "AGG on" : "");
|
|
}
|
|
desc += sprintf(buff+desc, "last tx rate=0x%X\n",
|
|
lq_sta->last_rate_n_flags);
|
|
desc += sprintf(buff+desc, "general:"
|
|
"flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
|
|
lq_sta->lq.general_params.flags,
|
|
lq_sta->lq.general_params.mimo_delimiter,
|
|
lq_sta->lq.general_params.single_stream_ant_msk,
|
|
lq_sta->lq.general_params.dual_stream_ant_msk);
|
|
|
|
desc += sprintf(buff+desc, "agg:"
|
|
"time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
|
|
le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit),
|
|
lq_sta->lq.agg_params.agg_dis_start_th,
|
|
lq_sta->lq.agg_params.agg_frame_cnt_limit);
|
|
|
|
desc += sprintf(buff+desc,
|
|
"Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
|
|
lq_sta->lq.general_params.start_rate_index[0],
|
|
lq_sta->lq.general_params.start_rate_index[1],
|
|
lq_sta->lq.general_params.start_rate_index[2],
|
|
lq_sta->lq.general_params.start_rate_index[3]);
|
|
|
|
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
|
|
index = iwl_hwrate_to_plcp_idx(
|
|
le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
|
|
if (is_legacy(tbl->lq_type)) {
|
|
desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n",
|
|
i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
|
|
iwl_rate_mcs[index].mbps);
|
|
} else {
|
|
desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n",
|
|
i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
|
|
iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs);
|
|
}
|
|
}
|
|
|
|
ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
|
|
kfree(buff);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
|
|
.write = rs_sta_dbgfs_scale_table_write,
|
|
.read = rs_sta_dbgfs_scale_table_read,
|
|
.open = open_file_generic,
|
|
.llseek = default_llseek,
|
|
};
|
|
static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
|
|
char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
char *buff;
|
|
int desc = 0;
|
|
int i, j;
|
|
ssize_t ret;
|
|
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
|
|
buff = kmalloc(1024, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < LQ_SIZE; i++) {
|
|
desc += sprintf(buff+desc,
|
|
"%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n"
|
|
"rate=0x%X\n",
|
|
lq_sta->active_tbl == i ? "*" : "x",
|
|
lq_sta->lq_info[i].lq_type,
|
|
lq_sta->lq_info[i].is_SGI,
|
|
lq_sta->lq_info[i].is_ht40,
|
|
lq_sta->lq_info[i].is_dup,
|
|
lq_sta->is_green,
|
|
lq_sta->lq_info[i].current_rate);
|
|
for (j = 0; j < IWL_RATE_COUNT; j++) {
|
|
desc += sprintf(buff+desc,
|
|
"counter=%d success=%d %%=%d\n",
|
|
lq_sta->lq_info[i].win[j].counter,
|
|
lq_sta->lq_info[i].win[j].success_counter,
|
|
lq_sta->lq_info[i].win[j].success_ratio);
|
|
}
|
|
}
|
|
ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
|
|
kfree(buff);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
|
|
.read = rs_sta_dbgfs_stats_table_read,
|
|
.open = open_file_generic,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file,
|
|
char __user *user_buf, size_t count, loff_t *ppos)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = file->private_data;
|
|
struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
|
|
char buff[120];
|
|
int desc = 0;
|
|
|
|
if (is_Ht(tbl->lq_type))
|
|
desc += sprintf(buff+desc,
|
|
"Bit Rate= %d Mb/s\n",
|
|
tbl->expected_tpt[lq_sta->last_txrate_idx]);
|
|
else
|
|
desc += sprintf(buff+desc,
|
|
"Bit Rate= %d Mb/s\n",
|
|
iwl_rates[lq_sta->last_txrate_idx].ieee >> 1);
|
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
|
|
}
|
|
|
|
static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
|
|
.read = rs_sta_dbgfs_rate_scale_data_read,
|
|
.open = open_file_generic,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static void rs_add_debugfs(void *priv, void *priv_sta,
|
|
struct dentry *dir)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = priv_sta;
|
|
lq_sta->rs_sta_dbgfs_scale_table_file =
|
|
debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_scale_table_ops);
|
|
lq_sta->rs_sta_dbgfs_stats_table_file =
|
|
debugfs_create_file("rate_stats_table", S_IRUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_stats_table_ops);
|
|
lq_sta->rs_sta_dbgfs_rate_scale_data_file =
|
|
debugfs_create_file("rate_scale_data", S_IRUSR, dir,
|
|
lq_sta, &rs_sta_dbgfs_rate_scale_data_ops);
|
|
lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file =
|
|
debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
|
|
&lq_sta->tx_agg_tid_en);
|
|
|
|
}
|
|
|
|
static void rs_remove_debugfs(void *priv, void *priv_sta)
|
|
{
|
|
struct iwl_lq_sta *lq_sta = priv_sta;
|
|
debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file);
|
|
debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
|
|
debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file);
|
|
debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialization of rate scaling information is done by driver after
|
|
* the station is added. Since mac80211 calls this function before a
|
|
* station is added we ignore it.
|
|
*/
|
|
static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta)
|
|
{
|
|
}
|
|
static struct rate_control_ops rs_ops = {
|
|
.module = NULL,
|
|
.name = RS_NAME,
|
|
.tx_status = rs_tx_status,
|
|
.get_rate = rs_get_rate,
|
|
.rate_init = rs_rate_init_stub,
|
|
.alloc = rs_alloc,
|
|
.free = rs_free,
|
|
.alloc_sta = rs_alloc_sta,
|
|
.free_sta = rs_free_sta,
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
.add_sta_debugfs = rs_add_debugfs,
|
|
.remove_sta_debugfs = rs_remove_debugfs,
|
|
#endif
|
|
};
|
|
|
|
int iwlagn_rate_control_register(void)
|
|
{
|
|
return ieee80211_rate_control_register(&rs_ops);
|
|
}
|
|
|
|
void iwlagn_rate_control_unregister(void)
|
|
{
|
|
ieee80211_rate_control_unregister(&rs_ops);
|
|
}
|
|
|